HomeMy WebLinkAboutOrdinance 7083 ORDINANCE NO. �
AN ORDINANCE AMENDING EXHIBIT A AND EXHIBIT B OF ORDINANCE
140. 6408, THE MECHANICAL CODE OF THE CITY OF FORT WORTH, AS
AMENDED, BY AhiENDlNG THAT SECTION OF CHAPTER 1, TITLE AND
SCOPE, THEREOF, CONCERNING SCOPE; BY SUBSTITUTING THE TERM
BUILDING OFFICIAL IN LIEU OF CHIEF MECHANICAL INSPECTOR, BY
AMENDING THOSE SECTIONS OF CHAPTER 3, PERMITS AND INSPECTION,
THEREOF, CONCERNING PERMITS, INSPECTION AND INSPECTION FEES;
BY DELETING, ADDING AND AMENDING CERTAIN DEFINITIONS WITHIN
CHAPTER 4, DEFINITIONS AND ABBREVIATIONS, THEREOF; BY AMENDING
THOSE SECTIONS OF CHAPTER 5, EQUIPMENT -- GENERAL, THEREOF, COw-
CERNING TYPE OF FUEL AND FUEL CONNECTIONS, AUTOMATIC CONTROL
DEVICES, LABELING, GARAGE INSTALLATIONS, AND BY AMENDING
CERTAIN HEADINGS AND SUBHEADINGS OF TABLES 5-A AND 5-B; BY
AMENDING THOSE SECTIONS OF CHAPTER 6, COMBUSTION AIR, THEREOF,
CONCERNING GENERAL PROVISIONS REGARDING COMBUSTION AIR, COM-
BUSTION AIR OPENINGS, AND BY AMENDING TABLE 6-A; BY AMENDING
THOSE SECTIONS OF CHAPTER 7, HEATING SYSTEMS, THEREOF, CON-
CERNING ACCESS, CIRCULATING AIR SUPPLY AND BY AMENDING CERTAIN
FOOTNOTES TO TABLE 7-A; BY AMENDING THAT SECTION OF CHAPTER 8,
VENTED DECORATIVE APPLIANCES, FLOOR FURNACES, VENTED WALL
FURNACES, UNIT HEATERS, AND ROOM HEATERS, THEREOF, CONCERNING
ROOM HEATERS, BY AMENDING THOSE SECTIONS OF CHAPTER 9, VENTING
OF APPLIANCES, THEREOF, CONCERNING GENERAL PROVISIONS RE-
GARDING THE VENTING OF APPLIANCES, LOCATION AND SUPPORT OF
VENTING SYSTEMS OTHER THAN CHIMNEYS, METAL CHIMNEYS, AND BY
AMENDING TABLE 9-C; BY AMENDING CHAPTER 10, DUCTS, IN ITS
ENTIRETY; BY AMENDING THOSE SECTIONS OF CHAPTER 11 , VENTI-
LATION SYSTEMS, THEREOF, CONCERNING DUCTS FOR GREASE HOODS,
SAFETY DEVICES, EXHAUST SYSTEM FOR INTERIOR TOILETS; BY
DELETING THE TERM "COMFORT" THROUGHOUT EXHIBITS A AND B OF
ORDINANCE 110. 6408 AND, MORE PARTICULARLY, THROUGHOUT CHAPTER
12 THEREOF, BY AMENDING CHAPTER 12, COOLING, THEREOF, BY
AMENDING THOSE SECTIONS OF SUCH CHAPTER 12 THEREOF CONCERNING
INSTALLATION, CIRCULATING AIR SUPPLY, CHILLED-HOT WATER
PIPING MATERIALS; BY AMENDING CHAPTER 13 THEREOF IN ITS
ENTIRETY, SO THAT SUCH CHAPTER REGULATES EVAPORATIVE COOLING
SYSTEMS; BY AMENDING PART IV, REFRIGERATION, THEREOF, TO
INCLUDE CHAPTER 14, WHICH CHAPTER IS AMENDED IN ITS ENTIRETY
TO REGULATE ABSORPTION REFRIGERATING EQUIPMENT; BY AMENDING
CHAPTER 15, MECHANICAL REFRIGERATING EQUIPMENT, IN ITS
ENTIRETY, THEREOF; BY AMENDING THOSE SECTIONS OF CHAPTER 18,
INCINERATORS, THEREOF, CONCERNING REFUSE STORAGE ROOMS FOR
SMALL AND LARGE INCINERATORS, AUTOMATIC SPRINKLERS, CHIMNEYS,
GENERAL PROVISIONS; BY AMENDING THAT SECTION OF CHAPTER 19,
MISCELLANEOUS HEAT-PRODUCING APPLIANCES, THEREOF, CONCERNING
KITCHEN VENTILATION AND CLOTHES DRYERS; BY AMENDING APPENDIX C,
EQUIPMENT STANDARDS, IN ITS ENTIRETY, THEREOF; BY AMENDING
UNIFORM MECHANICAL CODE STANDARD NO. 10-1 , NONMETALLIC DUCTS,
THEREOF, BY DELETING TABLE 10-1-A; BY AMENDING THOSE SECTIONS
OF SUCH UNIFORM MECHANICAL CODE STANDARD NO. 10-1 THEREOF,
CONCERNING IMPACT, EROSION, RUPTURE, AND TENSION; BY DELETING
UNIFORM MECHANICAL CODE STANDARD NO. 15-1 , MECHANICAL RE-
FRIGERATION, THEREOF; PROVIDING THAT THIS ORDINANCE SHALL BE
CUMULATIVE OF ALL ORDINANCES AFFECTING THE REGULATION OF
HEATING, COOLING, REFRIGERATION, VENTILATION AND EXHAUST SYSTEMS
AND OTHER MISCELLANEOUS HEAT-PRODUCING APPLIANCES; PROVIDING
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FOR REPEAL; PROVIDING A SAVINGS CLAUSE; PROVIDING A SEVER-
ABILITY CLAUSE; PROVIDING A PENAL CLAUSE; AND NAMING AN EFFEC-
TIVE DATE.
BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY OF FORT WORTH,
TEXAS:
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' A
SECTION 1 .
That a paragraph (e) is hereby added to Section 103 of Exhibit B
of Ordinance No. 6408 be, and after being so added the same shall read
as follows:
"(e) Where the words `shall' or `shall not' are used
throughout this code same shall be construed as mandatory."
SECTION 2.
That the last paragraph of Section 103 of Exhibit B of Ordinance No.
6408 be, and the same is hereby amended to read as follows,
"(d) Appendix C contains gas venting tables and a list of
recommended equipment standards and i,s intended to serve only as
a guide. The design and testing of equipment regulated by this
Code shall be subject to the approval of the Building Official."
SECTION 3.
That Section 105 of Exhibit A of Ordinance No. 6408 be, and the
same is hereby amended to read as follows:
"Sec. 105. The provisions of this Code are not intended
to prevent the use of any material or method of construction
not specifically prescribed by this Code, provided any such
alternate has been approved.
"The Building Official may approve any such alternate pro-
vided he finds the proposed design is satisfactory and complies
with the provisions of this Code, and that the material , method,
or work offered is, for the purpose intended, at least the equiva-
lent of that prescribed in this Code in quality, strength_, effec-
tiveness, fire resistance, durability, and safety.
"The Building Official shall require that sufficient evi-
dence or proof be submitted to substantiate any claims that
may be made regarding its use."
SECTION 4.
That the term "Chief Mechanical Inspector," as that term is used
throughout Exhibit A and Exhibit B of Ordinance No. 6408, shall here-
after read as "Building Official" throughout said Exhibit A and
Exhibit B, except that Subsection (a) of Section 201 of Exhibit B of
Ordinance No. 6408 shall be, and the same is hereby amended to read
as follows:
"Sec. 201 (a) GENERAL. The Building Official is hereby
authorized and directed to enforce all of the provisions of
this Code. For such purpose, he shall have the powers of a
police officer."
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SECTION 5.
That Subsection (b) of Section 202 of Exhibit B of Ordinance 6408
be, and the same is hereby amended to read as follows:
"(b) Any person, including a firm or corporation violating any of
the provisions of this Code shall be deemed guilty of a misdemeanor,
and each such person shall be deemed guilty of a separate offense
for each and every day or portion thereof during which any violation
of any of the provisions of this Code is committed, continued, or
permitted; and upon conviction of any such violation, such person
shall be punished as provided by the laws of the State of Texas."
SECTION 6.
That Section 203 of Exhibit B of Ordinance 6408 be, and the same
is hereby amended to read as follows:
"Sec. 203. (a) In order to determine the suitability
of alternate materials and types of construction and to provide
for reasonable interpretations of the provisions of this Code,
there shall be and is hereby created a Mechanical Board of
Appeals, hereafter referred to as the 'Board,' or as 'Mechanical
Board,' consisting of eight members who are qualified as set forth
below. The Building Official or his designated representative
shall be an ex-officio member and shall act as Secretary of the Board.
"(b) The Mechanical Board shall be appointed by the appointing
authority and shall hold office at its pleasure. The Board shall
adopt reasonable rules and regulations for conducting its investi-
gations and shall render all decisions and findings in writing.
"(c) The Board shall consist of:
Place Qualifications
1. Citizen not in Building Industry
2. Registered Mechanical Engineer
3. Registered Mechanical Engineer
4. Registered Engineer Contractor
5. Licensed Mechanical Contractor
6. Licensed Air Conditioning Contractor
7. Citizen in the Air Conditioning Industry
8. Architect
"(d) The members shall hold office for a term of two (2)
years unless relieved for cause prior to that time. Members in
even-numbered places shall be appointed in even-numbered years.
Members in odd-numbered places shall be appointed in odd-
numbered years. Members shall not serve more than three (3)
consecutive two year terms.
"(e) The City Council may remove any member of the Board
during the term for which he may be appointed.
"(f) Should a vacancy occur, the City Manager, by and
with the advice and consent of the City Council , shall appoint
a person having the prerequisite qualifications of the place
vacated to fulfill the unexpired term of said place.
"(g) Any six (6) members of the Board shall constitute
a quorum to transact business but no decision shall be handed
down unless concurred in by not less than five (5) members.
The Building Official shall not vote when the Board is
reviewing a decision made by him. The Board shall hold
meetings at such time and place as called by the Chairman
or one acting lawfully in that capacity.
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"(h) In addition to the members set out in Section 203
Cc) of this Code, the following City Officials shall be
Advisors to the Board.
1. City Attorney
2. Director of Health
3. Fire Marshal
When required by the Board, the Advisory members shall attend
and furnish necessary special reports and inspections.
"(i) It shall be the duty of the Board to meet as soon
after their appointment as is practicable. One member shall
be elected Chairman and shall serve as the Presiding Officer
of the Board for a period of one (1) year.
"(j) The Building Official , who serves as Secretary of
the Board, shall perform the following services:
"l. Keep the Minutes, Books, Files and other
Records of the Board.
"2. Issue all Licenses in the name of the Board.
"3. Send out all Notices and attend to all cor-
respondence under the direction of the Board.
"4. Collect License Fees for which provision is made
by Ordinance; same to be deposited with the
Building Official .
"5. He shall perform such other duties as are in-
cidental to his office and as may be required
by the Board.
"(k) The Board shall have the power to make and pro-
mulgate its own rules governing its meetings and proceed-
ings, subject to the provisions of this Ordinance.
"Miscellaneous office supplies shall be furnished to
the Board by the Building Inspection Division.
"(1) The Building Official shall execute and enforce
all legally endowed decisions of the Board."
SECTION 7.
That Section 205 of Exhibit B of Ordinance No. 6408 be, and the
same is hereby amended to read as follows:
"Sec. 205. (a) Any person, firm, company or corporation
aggrieved by any decisions of the Building Official under this
Chapter may appeal such decision or order to the Board as
set out herein.
"(b) Appeals to the Board must be filed in writing within
thirty (30) days from date of the decision or order appealed
from and shall be filed in duplicate with the Secretary of the
Board. Such notice shall contain appropriate reference to the
decision or order appealed from as well as the grounds of the
appeal . It shall be the duty of the Secretary to notify the
Chairman of the Board of appeals filed and the details thereof.
"(c) At the time of filing an appeal, the appellant
shall be required to pay an appeal fee of Twenty-five Dollars
($25.00).
"(d) The Secretary shall transmit to the Board all relevant
records and data upon which the appeal was taken.
"(e) The Board shall fix a reasonable time, not to exceed
thirty (30) days, for the hearing of an appeal , giving notice
in writing to the parties in interest and shall reach its decision
within a reasonable time thereafter. Parties may appear before
the Board in person, by agents, or by attorney. The Board may
require additional data and tests necessary for adequate decision
of the appeal.
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"(f) The Board shall have the power in all cases appealed to
it from a decision or orders of the Building Official to reverse or
affirm or modify in whole or in part, the decision or order
appealed from. No decision of the Board shall vary or be incon-
sistent with the terms,provisions and requirements of this Code."
SECTION 8.
That Section 207 of Exhibit B of Ordinance No. 6408 be, and
the same is hereby amended to read as follows:
"Sec. 207. The Board shall review all proposed amend-
ments to the Mechanical Code and shall recommend such changes
or amendments to the City Council, as they deem appropriate,
every third year after the UNIFORM MECHANICAL CODE is pub-
lished."
SECTION 9.
That Section 208 of Exhibit B of Ordinance No. 6408 be, and
the same is hereby amended to read as follows:
"Sec. 208 (a) Any person holding a valid Mechanical and
Air Conditioning Contracting License, issued by the State of
Texas or a Texas political subdivision, may be issued a tem-
porary license for a period of time not to exceed nine (9)
months.
"(b) The temporary license permitted in paragraph (a)
above shall be issued only to holders of a license from those
governmental subdivisions, approved by the Building Official, and
that have reached an agreement of reciprocity with the City
of Fort Worth. Such agreement may be by letters from the
administrative authority of such governmental subdivision.
"(c) License fees corresponding to the amount set forth
in Ordinance No. 6840 shall be paid in full before the issuance
of a temporary license. Only one (1) temporary license shall
be issued to an individual. This temporary license shall permit
him to make an installation on only one contract."
SECTION 10.
That Section 301 of Exhibit A of Ordinance No. 6408 be, and the
same is hereby amended to read as follows:
"Sec. 301. No person shall install, alter or reconstruct
any heating, ventilation, cooling, refrigerating equipment
and/or other items set forth in Section 304, unless a permit
therefor has first been obtained from the Building Official, in
accordance with the Inspection Fee schedule set forth in
Section 304.
"In existing residential construction, an existing furnace
room may be used for a replacement furnace, providing the door
is not smaller than eighteen (18) inches in width. The Building
Official may authorize the removal of the door casing."
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"A permit shall be obtained for all heating, ventilating,
cooling or refrigeration equipment, moved with, or installed
in, any relocated building.
"A separate permit shall be obtained for the equipment installed
in each separate building or structure.
"A permit shall not be required for the following:
"l. Any portable heating appliance.
"2. Any portable ventilating equipment.
"3. Any portable cooling unit.
"4. Any steam, hot, or chilled water piping within
any heating or cooling system regulated by this
Code.
"5. Replacement or repair of any component part of an
appliance which does not alter its original approval
and complies with other applicable requirements of
this Code.
"6. Any portable evaporative cooler.
"7. Any refrigerating equipment which is a part
of the equipment for which a permit has been
issued pursuant to the requirements of this
Code.
"8. Any unit refrigerating system installed in an
I-Occupancy and commonly referred to as a
window unit."
SECTION 11.
That subsection (b) of Section 302 of Exhibit B of Ordinance No.
6408 be, and the same is hereby amended to read as follows:
"(b) Permits for heating, cooling and refrigeration,
will be issued only to holders of a valid Mechanical and
Air Conditioning License.
"l. Such licenses are not required in order to
obtain permits for the installation, altera-
tion or repair of evaporative coolers, fans,
ventilation and exhaust systems, boilers,
clothes dryers, incinerators and prefabri-
cated fireplaces. A State License is required
to obtain a permit for installation of an auto-
matic fire-extinguishing system in a commercial
kitchen hood."
SECTION 12.
That Paragraph 3 of subsection (b) 3. of Section 302 of Exhibit B
of Ordinance No. 6408 be, and the same is hereby amended to read as
follows:
"3. Installations other than those listed in Items 1
and 2 above, where the aggregate BTUH input capacity does not
exceed 400,000 BTUH for environmental heating, or an aggregate
of 25 horsepower and over for environmental cooling, or an
aggregate input capacity in excess of 400,000 BTUH for
absorption units."
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SECTION 13,
That paragraph 8 of subsection (d) of Section 302 of Exhibit A
of Ordinance No. 6408 be, and the same is herewith repealed.
SECTION 14.
That a Paragraph 8 of Subsection 302 is hereby added to Exhibit B
of Ordinance No. 6408 be, and after being so added same shall read as
follows;
"(d) 8. Location of all air dampers, products of combustion
dampers, smoke and fire dampers and/or doors and products of
combustion detectors."
SECTION 15.
That Items 13 through 33, inclusive, of Inspection Fees of Section
304 of Exhibit B of Ordinance No. 6408 be, and the same are hereby amended
to read as follows:.
"13. Through wall heating and air conditioning units $ 3.00
"14. Commercial food preparation hood----------------- WOO
"15. Grease hood exhaust duct------------------------- 3.00
"16. Commercial hood exhaust fan---------------------- 4.00
"17. Commercial kitchen make-up air system------------ 5.00
"18. Automatic fire-extinguishing equipment system----- 10.00
"19. Range hood with fan, for I occupancy-------------- 1.00
"20. Range hood exhaust duct, for I occupancy---------- 1.00
"21. Toilet exhaust fan and duct----------------------- 1 .00
"22. Ventilation fan and duct system------------------- 4.00
"23. Mechanical roof ventilator------------------------ 4.00
"24. Flue vent or stack for commercial and
industrial appliances----------------- 5.00
"25. Prefabricated fireplace with listed flue---------- 3.00
"26. Commercial clothes dryer and vent----------------- 3.00
"27. Inspection of previously rejected work-------- --- 5.00
"28. Certified letter for Notification of Building Code
Nonconformance-------------------------- 5.00
"29. Incinerator, based on Type I waste at maximum
rating, per pound----------------------- 0.12
"30. Incinerator modification-------------------------- 50.00
"31. Installation of duct system not included elsewhere 3.00
"32. French drain----------------------------- ------ 1.00
"33. For each appliance or piece of equipment regulated
by this Ordinance for which no other
fee is listed--------------------------- 3.00
SECTION 16.
That the third Paragraph of Section 305 of Exhibit A of
Ordinance No. 6408 be, and the same is hereby repealed.
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SECTION 17.
That a third Paragraph of Section 305 be, and the same is hereby
added to Exhibit B of Ordinance No. 6408 be, and after being so added
shall read as follows:
"Sec. 305 * * *
"It shall be the responsibility of the permit holder
to request a final inspection from the Building Inspection
Division upon completion of an installation requiring a
permit."
SECTION 18.
That the definition "ABSORPTION UNIT" within Section 404 of
Exhibit A of Ordinance No. 6408 be, and the same is hereby amended to
read as follows:
"ABSORPTION UNIT is an absorption refrigeration system
which has been factory assembled and tested prior to its
installation."
SECTION 19.
That the following terms and definitions of "AIR FILTERS," "AIR
FLOW SWITCHES," "AIR POLLUTION" and "ALTERATION" within Section 403
of Exhibit B of Ordinance No. 6408 be, and the same are hereby repealed.
SECTION 20.
That the definition, "BRAZED JOINT," within Section 404 of Exhibit A
of Ordinance No. 6408 be, and the same is hereby amended to read as
follows:
"BRAZED JOINT is any joint obtained by joining of
metal parts with alloys which melt at temperatures higher
than 800"F., but lower than the melting temperature of the
parts to be joined."
SECTION 21.
That the definition, "B.T.U." within Section 404 of Exhibit A
of Ordinance No. 6408 be, and the same is hereby amended to read
as follows:
"B.T.U. (BTUH.) is the listed maximum capacity of any
appliance, absorption unit, or burner expressed in British
thermal units input per hour."
SECTION 22.
That the definition, "BUILDING CODE" within Section 404 of Exhibit A
of Ordinance No. 6408 be, and the same is hereby amended to read as follows:
"Building Code is the Fort Worth Building Code."
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SECTION 23.
That the definition, "BUILDING OFFICIAL" within Section 404 of
Exhibit B of Ordinance No. 6408 be, and the same is hereby amended to
read as follows:
"BUILDING OFFICIAL is the officer charged with the adminis-
tration and enforcement of this Code, or his regularly
authorized deputy.
SECTION 24.
That the following terms and definitions contained within Section
405 of Exhibit A of Ordinance No. 6408 be, and the same are hereby
amended or added, as hereinafter specified:
The term "CIRCULATING AIR SUPPLY" therein be, and the same is hereby
amended to read as "CIRCULATING AIR" therein.
The term "CLOSET (see CONFINED SPACE)" be, and the same are
hereby added in the proper alphabetical sequences therein.
The term "CONDITIONED AIR SUPPLY" therein and the definition of
"CONDITIONED AIR SUPPLY" therein be, and the same are hereby amended to
read as follows:
"CONDITIONED AIR is air being conveyed to a conditioned
area through ducts or plenums from a heat exchanger of a heating,
cooling, absorption or evaporative cooling system."
The term "CONDITIONED AREA" therein and the definition of "CONDITIONED
AREA" therein be, and the same are hereby amended to read as follows:
"CONDITIONED SPACE is an area, room or space normally
occupied and being heated, or cooled, for human habitation, by
any equipment."
The following terms and definitions be, and the same are hereby
added in the proper alphabetical sequence therein:
"CONFINED SPACE is any room or enclosed space that has
a volume less than twelve (12) times the total volume of a
furnace or furnaces and sixteen (16) times the total volume
of a boiler or boilers located in such room or space. If
the actual ceiling height of the room or space is greater
than eight (8) feet, the volume shall be calculated on the
basis of a ceiling height of eight (8) feet."
"COMPANION OR BLOCK VALVES are pairs of mating stop
valves, valving off sections of systems and arranged so
that these sections may be joined before opening these
valves or separated after closing them."
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SECTION 25.
That the following terms and definitions thereof of "CONTROL,
LIMIT," "CONTROL, SAFETY" and "COOKING APPLIANCE, FLOOR MOUNTED
RESTAURANT TYPE" within Section 405 of Exhibit B of Ordinance 6408
be, and the same are hereby repealed.
SECTION 26.
That the following terms and definitions contained within Section 406 of
Exhibit A of Ordinance No. 6408 be, and the same are hereby amended
as hereinafter specified:
"The term "DESIGN WORKING PRESSURE" therein be, and the same is
hereby amended to read as "DESIGN PRESSURE" therein.
The term and definition of "DUCT" therein be, and the same is
hereby amended to read as follows:
"DUCT is any tube or conduit for transmission of air.
This definition shall not include:
"l. A vent, a vent connector, or a chimney connector.
"2. Any tube or conduit wherein the pressure of the air
exceeds one pound per square inch.
"3. The air passages of listed self-contained systems."
SECTION 27.
That the definition of ELECTRIC COMFORT HEATING APPLIANCE within
Section 407 of Exhibit A of Ordinance No. 6408 be, and the same is
hereby amended to read as follows:
"ELECTRIC HEATING APPLIANCE is a device which produces
heat energy to create a warm environment by the application of
electrical power to resistance elements, refrigerant com-
pressors or dissimilar material junctions."
SECTION 28.
That the term and definition of "EXHAUSTER" within Section 407 of
Exhibit B of Ordinance No. 6408 be, and the same is hereby repealed.
SECTION 29.
That the terms and definitions of "FIRE DAMPER," "FIRE PARTITION,"
"FIRE RESISTIVE," "FIRE RESISTANCE RATING," "FIRE WALL," "FLAME-SPREAD
RATING," and "FLAMMABLE LIQUIDS" within Section 408 of Exhibit B of
Ordinance No. 6408 be, and the same are repealed.
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SECTION 30.
That the term and definition of "FIRE CODE" are hereby added to
Section 408 of Exhibit B of Ordinance No. 6408 be, and after being so
added same shall read as follows:
"Sec. 408. FIRE CODE is the latest edition of the
City of Fort Worth Fire Code."
SECTION 31 .
That the term and definition of "GENERATOR" within Section 409
of Exhibit A of Ordinance No. 6408 be, and the same are hereby amended
to read as follows:
"GENERATOR is a device equipped with a means of heating used
in an absorption systemrto drive refrigerant out of solution."
SECTION 32.
That the term and definition of "HEATING EQUIPMENT" are hereby
added in the proper alphabetical sequence to Section 410 of Exhibit A
of Ordinance No. 6408 be, and after being so added, same shall read as
follows:
"HEATING EQUIPMENT includes all warm-air furnaces, warm-air
heaters, combustion products vents, heating air distribution
ducts and fans, all steam and hot water piping together with all
control devices and accessories installed as part of, or in
connection with, any environmental heating system or appliance
regulated by this Code."
SECTION 33.
That the term and definition of "HEATING SYSTEM" are hereby
added, in the proper alphabetical sequence, to Section 410 of Exhibit A
of Ordinance No. 6408 be, and after being so added same shall read as
follows:
"HEATING SYSTEM is a warm-air heating plant consisting
of a heat exchanger enclosed in a casing, from which the heated
air is distributed through ducts to various rooms and areas.
A heating system includes the circulating air and conditioned
air supply and all accessory apparatus and equipment installed
in connection therewith."
SECTION 34.
That the term and definition of "LABELED" within Section 414 of
Exhibit B of Ordinance No. 6408 be, and the same are hereby repealed.
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SECTION 35.
That the term and definition of "LISTING' within Section 414 of
Exhibit B of Ordinance No. 6408 be, and the same are hereby amended
to read as follows:
"LISTED AND LISTING are terms referring to equipment
which is shown in a list published by an approved testing
agency?qualified and equipped for experimental testing and
maintaining an adequate periodic inspection of current pro-
ductions,and whose listing shows that the equipment complies
with the Standards set forth in this Code."
SECTION 36.
That the term and definition of "MACHINERY ROOM' within Section
415 of Exhibit A of Ordinance No. 6408 be, and the same are hereby
repealed.
SECTION 37.
That the definition of "POSITIVE DISPLACEMENT COMPRESSOR" within
Section 418 of Exhibit A of Ordinance No. 6408 be, and the same is
hereby amended to read as follows:
"POSITIVE DISPLACEMENT COMPRESSOR is a compressor in
which increase in pressure is attained by changing the internal
volume of the compression chamber."
SECTION 38.
That the term and definition of "PUBLIC WAY" within Section 418
of Exhibit B of Ordinance No. 6408 be, and the same are hereby repealed.
SECTION 39.
That the term and definition of "RECEIVER-REFRIGERANT" within
Section 420 of Exhibit A of Ordinance No. 6408 be, and the same are
hereby repealed.
SECTION 40.
That the definition of "REFRIGERANT" within Section 420 of
Exhibit A of Ordinance No. 6408 be, and the same is hereby amended to
read as follows:
"REFRIGERANT is a substance used to produce refrigeration
by its expansion or vaporization."
SECTION 41 .
That the term of "REFRIGERATION SYSTEM" within Section 420 of
Exhibit A of Ordinance No. 6408 be, and the same are hereby amended
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to read as follows:
"REFRIGERATING SYSTEM is a combination of parts in which
a refrigerant is circulated for the purpose of extracting
heat. For refrigerating system ratings one horsepower, one ton,
or 12,000 B.t.u. 's per hour shall mean the same quantity.
"ABSORPTION REFRIGERATING SYSTEM, also an ABSORPTION SYSTEM,
is a refrigerating system in which the gas evolved in the evaporator
is taken up by an absorber or adsorber.
"MECHANICAL REFRIGERATING SYSTEM is one in which the gas
evolved in the evaporator is compressed by mechanical means.
For the purpose of this Code, absorption or mechanical
refrigeranting systems are classified as follows:
"DIRECT REFRIGERATING SYSTEM is one in which the refrigerant
evaporator is in direct contact with the material or space to be
refrigerated or is located in air circulating passages communica-
ting with such spaces.
"INDIRECT REFRIGERATING SYSTEM is one in which a fluid
cooled by a refrigerating system is circulated to the material
or space to be refrigerated or is used to cool air so circulated."
SECTION 42.
That the term and definition of "REPAIRS" within Section 420 of Exhibit B
of Ordinance No. 6408 be, and the same are hereby repealed.
SECTION 43.
That the following terms and definitions of "SAFE CONDITION," "SHALL,"
"SHOULD," "SMOKE DAMPER" and "SMOKE DEVELOPED RATING" within Section 421 of
Exhibit B of Ordinance No. 6408 be, and the same are hereby repealed.
SECTION 44.
That the definition of "SOLDERED JOINT" within Section 421 of
Exhibit A of Ordinance No. 6408 be, and the same is hereby amended to read
as follows:
"SOLDERED JOINT is a joint obtained by the joining of
metal parts with metallic mixtures or alloys which melt below
800°F. and above 4 W F."
SECTION 45.
That subsection (a) of the first paragraph of Section 502 of Exhibit
B of Ordinance No. 6408 be, and the same is hereby amended to read as
follows:
"Sec. 502. (a) Each appliance shall be approved by
the Building Official for safe use or comply with applicable
nationally recognized standards as determined by an approved
testing agency."
SECTION 46.
That the first paragraph of subsection (a) of Exhibit B of Section
503 of Ordinance No. 6408 be, and the same is hereby amended to read as
follows:
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"Sec. 503 (a) GENERAL. Each appliance shall be
designed for use with the type of fuel to which it will
be connected. Such appliances shall not be converted
from the fuel specified on the rating plate for use with
a different fuel without securing reapproval from the
Building Official and as recommended by the manufacturer
of either the original equipment or the conversion equip-
ment. The serving gas supplier may convert appliances
in accordance with procedures approved by the Building
Official without securing such reapproval, if properly
relabeled."
SECTION 47.
That paragraphs land 2 of Section 503(a) of Exhibit B of
Ordinance No. 6408 be, and the same are hereby repealed.
SECTION 48.
That Section 505 of Exhibit A of Ordinance No. 6408 be, and the same
is hereby amended to read as follows:
"Sec. 505. Appliances shall be readily access-
ible for inspection, service, repair or replacement
without removing permanent construction.
"Unless otherwise specified, not less than 30
inches of working space and platform shall be provi-
ded to service the appliance.
"EXCEPTION: Unit heaters and room heaters may
be installed with an 18-inch minimum working space.
A platform shall not be required for unit heaters
or room heaters.
"The operating instructions must be attached
to the appliance where they can be read easily."
SECTION 49.
That the "EXCEPTION" to Section 506 (a) of Exhibit A of Ordinance
No. 6408 be, and the same is hereby amended to read as follows:
"EXCEPTION: The listed shut-off devices shall not
be required on range or cooking tops, log lighters, lights,
or other open burner manually operated appliances or listed
appliances not requiring such devices and specific industrial
appliances, as approved by the Building Official."
SECTION 50.
That subsections (e) and (f) of Section 506 of Exhibit B of Ordinance
6408 be, and the same are hereby repealed.
SECTION 51 .
That subsection (b) of Section 507 of Exhibit A of Ordinance No. 6408
be, and the same is hereby amended to read as follows:
-15-
"(b) Electric Heating Appliances. Every electric heating
appliance shall bear a permanent and legible factory applied
nameplate on which shall appear:
"1. The name or trademark of the manufacturer.
"2. The catalog (model ) number or equivalent.
"3. The electrical rating in volts, amperes (or
watts) and phase, for other than single phase.
"In addition, such appliance shall be permanently and legibly
marked at the factory with:
"A. The output rating in Btuh or Watts.
"B. The electrical rating in volts, amperes, or watts
of each field replaceable electrical component.
"C. A seal indicating approval of the appliance by
an approved testing agency.
"D. Required clearances from combustible surfaces on
which or adjacent to which it may be mounted.
"And, it shall be accompanied by clear and complete installa-
tion instructions, including required clearances from combustibles
other than mounting or adjacent surfaces, and temperature rating of
field installed wiring connections if over 60' C."
SECTION 52.
That the last paragraph of Section 508 of Exhibit A or Ordinance No.
6408 be, and the same is hereby amended to read as follows:
"Heating equipment located in rooms where cellulose nitrate
plastic is stored or processed shall comply with U.B.C. Standard
No. 48-2.
SECTION 53.
That Sections 509, and 511 of Exhibit B of Chapter 5 of Ordinance
No. 6408 be, and the same are hereby amended to be renumbered respectively
as 511 and 512. Section 510 is hereby repealed.
SECTION 54.
That Section 509 of Exhibit A of Ordinance No. 6408 be, and the same
is hereby added to Chapter 5 and when so added shall read as follows:
Electrical Connections
"Sec. 509. Equipment regulated by this Code, requiring elec-
trical connections of more than 50 volts, shall have a positive
means of disconnect adjacent to and in sight from the equipment
served. A 120-volt receptacle shall be located within 25 feet
of the equipment for service and maintenance purposes. Low voltage
wiring of 50 volts or less, within a structure, shall be installed
in a manner to prevent physical damage. Such wiring, exposed to
weather, shall be installed in conduit approved for exterior use."
-16
SECTION 55.
That Section 510 of Exhibit A of Ordinance No. 6408 be, and the
same is hereby added to Chapter 5 and when so added shall read as
follows:
Indirect Waste Connections
Sec. 510. Condensate from air cooling coils and the
overflow from evaporative coolers and similar water supplied
equipment shall be collected and discharged to an approved
plumbing fixture or approved disposal area. The drain shall
have a slope of not less than 1/8 inch per foot and shall be
of approved corrosion-resistant pipe not less in size than
3/4 inch for air cooling coils and not less than the drain
outlet size for evaporative coolers or other equipment. Con-
densate or waste water shall not drain over a public way.
SECTION 56.
That the subheading of Table No., 5-A of Exhibit A or Ordinance No.
6408 be, and the same is hereby amended to read as follows:
"These standard clearances apply unless otherwise shown
on listed appliances, in which case the listed clearance takes
precedence. Appliances shall not be installed in alcoves or
closets unless so listed. For installation on combustible
floors see Footnote No. 2.";
and that Footnote No. 1 to Table No. 5-A of Exhibit A of Ordinance No.
6408 be, and the same is hereby amended to read as follows:
"When appliances are installed in large rooms, these
standard clearances may be reduced by affording protection
to combustible material in accordance with Table No. 5-B.
See Footnote No. 3 below."
SECTION 57.
That the Heading above columns of Table ('o. 5-B of Exhibit A of
Ordinance No. 6408 be, and the same is hereby amended to read as follows:
"WHERE THE STANDARD CLEARANCE IN TABLE NO. 5-A WITH
NO PROTECTION IS (see footnote No. 1 below) "
SECTION 58.
That Subsection (a) of Section 601 of Exhibit A of Ordinance No.
6408 be, and the same is hereby amended to read as follows:
"Sec. 601 (a) Air Supply. All fuel-burning equipment
shall be assured a sufficient air supply, taken directly fror�
outside of the structure, for proper fuel combustion, venti-
lation and draft hood dilution.
"EXCEPTION: The method of providing combustion air in this
Chapter shall not apply to sealed combustion system appliances,
enclosed furnaces, listed cooking appliances, refrigerators and
clothes dryers."
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SECTION 59.
That Subsections (b), (c), (d) and (e) of Section 601 of Exhibits
A and B of Ordinance No. 6408 be, and the same are hereby amended to
read as follows:
"(b) Space Required. If the volume in cubic feet of the
room or space in which a fuel-burning appliance or appliances
are installed is less than one-twentieth of the maximum hourly
fuel input rate in B.t.u.'s of all such appliances, provision
shall be made to supply the deficiency in combustion and venti-
lating air for all fuel-burning appliances in such room other than
listed cooking appliances, refrigerators or dryers.
"(c) Insufficient Space-Solid Fuel. Rooms or spaces that do
not have the volume as specified in Subsection (b) of this Section
in which an appliance or appliances arranged to burn solid fuel
are installed shall be provided with minimum unobstructed combustion
air openings equal to 2 square inches for each 1000 B.t.u.'s per
hour fuel input of such appliances, with a minimum total free area
of 200 square inches as specified in Section 603 of this Code.
"(d) Insufficient Space-Gas and Liquid. Except as otherwise
provided for in this Chapter, rooms or spaces that do not have the
volume as specified in Subsection (b) of this Section in which a gas
or liquid fuel-burning appliance or appliances are installed shall
be provided with minimum unobstructed combustion air openings equal
to that set forth in Table No. 6-A and as specified in Section 603
of this Code.
"Where the floor area of the appliance compartment is less
than twice the floor area of the appliances therein, the minimum
total free area shall be not less than 200 square inches.
"Where the floor area of the appliance compartment is more than
twice the floor area of the appliances therein, the minimum total
free area shall be not less than 100 square inches.
"(e) Existing Buildings. Where a fuel-burning appliance is installed
in a room or space of an existing building containing any other fuel-
burning equipment, such room or space shall be provided with a
sufficient supply of combustion air for all fuel-burning equipment
contained therein.
"EXCEPTION: Combustion air supply for gas-burning
equipment having a total B.t.u. input rating in excess
of 800,000 Btuh. for each hour may be designed in
accordance with accepted engineering principles when
approved by the Building Official.
"In calculating free area of grilles and louvers covering
combustion air inlets, consideration shall be given to the
blocking effect of louvers, grilles or screens protecting openings.
Screens used shall not be smaller than 1/4-inch mesh and shall be
readily accessible for cleaning. If the free area through a design
of louver or grille is known, it should be used in calculating the
size opening required to provide the free area specified. If the
design and free area are not known, it shall be assumed that wood
louvers will have 20 percent free area and metal louvers and grilles
will have 70 percent free area."
�18-
SECTION 60.
That Table No. 6-A of Exhibit A of Ordinance No. 6408 be, and the
same is hereby amended so that each and every reference therein to
"B.T.U. 's" shall read as "B.T.U.H.'s."
SECTION 61 .
That Subsection (a) of Section 603 of Exhibit A of Ordinance No.
6408 be, and the same is hereby amended to read as follows:
"Sec. 603(a) Air from Outside. Required combustion air
obtained from outside the enclosure shall be supplied as follows:
1. Through a permanent opening or openings of the required
area and opening directly to the outside of the building
through the floor, roof, or walls of the appliance
enclosure.
"2. Through a continuous duct or ducts of the required cross-
sectional area extending from the appliance enclosure to the
outside of the building."
"EXCEPTION: Where not otherwise prohibited the
combustion air supply may be obtained from an attic
area provided:
"(a) The attic has not less than 30 inches vertical
clear height at its maximum point.
"(b) Attic ventilation is sufficient to provide the
required volume of combustion air.
"(c) The combustion air opening is provided with a
galvanized steel sleeve of not less than No. 26 gage
extending from the appliance enclosure to at least
6 inches above the top of the ceiling joists. The
upper opening of such sleeve shall be screened.
"3. No circulating air supply for any blower-type furnace
shall be obtained from the area."
SECTION 62.
Reserved.
SECTION 63.
That Paragraph C of Section 603 of Ordinance No. 6408 be, and the
same is hereby amended to read as follows:
"(c) Prohibited Sources. Combustion air supply shall not be
obtained from any hazardous location or from any area in which ob-
jectionable quantities of flammable vapor, lint or dust are given
off. Combustion air shall not be taken from a machinery room."
SECTION 64.
That an EXCEPTION be added following paragraph 1 of Section 604 of
Ordinance 6408 be, and when so added shall read as follows:
"EXCEPTION: In Group I Occupancies, unobstructed stud and
joist spaces may be used provided not more than one required firestop
is removed."
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SECTION 65.
That Section 704 of Exhibit A of Ordinance No. 6408 be, and the same
is hereby amended to read as follows:
"LOCATION.
"Sec. 704. Warm-air furnaces shall not be installed as
follows.
"l. In any room or space less than twelve (12) inches
wider than the furnace or furnaces installed therein
with a minimum clear working space of not less than
three (3) inches along the sides, back and top of
the furnace. (,See also Section 711).
"EXCEPTION: Furnaces listed for less clearance
may be installed according to their listing.
"2. In any hazardous location.
"3. In any surgical operating room or medical treatment
room.
"4. Under any stairway.
"5. In a Group A, B, C, D, F or G Occupancy, unless
separated from the rest of the building by not less
than .a One-,hour Fire-resistive Occupancy Separation.
"EXCEPTIONS: 1. Boilers or central heating
plants where the largest piece of fuel equipment
does not exceed 400,000 B.T.U.H. per hour input.
"2. Buildings not more than one story in height
of Group F, Division 2 Occupancies with an occupant
load of less than 30.
1. Equipment installed on the roof of a building.
"6. In any Group E Occupancy unless separated from such
occupancy by not less than a Two-hour Fire-resistive
Occupancy Separation. In Group E, Divisions 1 and 2
Occupancies, there shall be no openings in such
separations except for necessary ducts and piping.
"7. In Group H Occupancies, unless separated from such
occupancy by not less than a One-hour Fire-resistive
Occupancy Separation.
"EXCEPTION: A separation shall not be required for
such equipment serving only one dwelling unit.
"8. In any room used, or designed to be used, as a
bedroom, bathroom, closet or in any confined space
with access only to such room or space. The access
to any furnace located in an attic or underfloor
crawl space may be through a closet.
"EXCEPTION: Fuel-burning heating equipment with
sealed combustion systems or enclosed furnaces, and
electric heating appliances.
"9. Outside of a building unless completely enclosed in a
weatherproof housing. This housing when constructed of
metal shall be of No. 24 gage galvanized sheet steal or
22 B & S gage aluminum supported on a substantial metal
frame. The housing shall be not larger than necessary
to properly cover and provide a minimum six (6) i.nch
-20-
clearance around the furnace or furnaces
enclosed therein, including all controls and
draft diverters.
"EXCEPTIQ'a: Furnaces listed for outdoor in-
stallation need not be enclosed."
SECTION 66.
That Table 7-A of Section 704 of Exhibit A of Ordinance 6408 be,
and the same is hereby repealed.
SECTION 67.
That Subsections (a), (b) and (c) of Section 705 of Exhibit A of
Ordinance No. 6408 be, and the same are hereby respectively amended to
read as follows:
"INSTALLATION.
"Sec. 705 (a). A direct-fired furnace shall not be
located on the discharge side of any refrigerant evapor-
ator or other air cooling coil unless such furnace is
specifically listed for such use.
"(b). A refrigerant evaporator or other air cooling coil
may be installed in the air discharge duct of a heating furnace
if such furnace is listed for use with an air cooling coil or is
listed for operation at not less than 0.5-inch water column
static pressure and is in conformance with Part IV of this Code.
Conversion of existing furnaces for use with cooling coils is
permissible if authorized by the manufacturer and approved by the
Building Official.
"(c). Every furnace supported from the ground shall rest on
a concrete slab extending not less than three (3) inches above the
adjoining ground level."
SECTION 68
That Section 706 of Exhibit A of Ordinance No. 6408 be, and the same
is hereby amended to read as follows:
"CIRCULATING AIR.
"Sec. 706 (a) Source. Circulating air shall be taken from
outside the building or from the conditioned area inside the
building, or from both sources.
"Every heating system regulated by this Code, and designed
to replace required ventilation, shall be arranged to discharge
into the conditioned space not less than the amount of outside
air specified in the Building Code.
"(b) Duct System. Circulating air for any blower type heating
system shall be conducted through ducts complying with Chapter 10.
"Corridors shall not be designed or used as an integral part
of a duct system when the corridor is required to be of fire-
resistive construction by Section 3304 of the Building Code.
-21-
"(c) Separation. Except as provided in this Section, there
shall be a positive separation between any combustion air and the
circulating air for any blower-type heating system.
"Every combustion chamber opening shall be separated from any
fan plenum by an airtight separation without openings therein,
except through an air lock not less than sixteen (16) square feet
in area, equipped with tight-fitting doors arranged to close
automatically.
"EXCEPTION: This shall not apply to a fan plenum access
opening which does not exceed 24 inches by 30 inches (720
square inches) if the opening is equipped with a tight-
fitting panel or door.
"(d) Air Requirements. The minimum unobstructed total area
of the circulating air openings or ducts to a gravity-type warm-air
furnace shall be not less than seven (7) square inches for each
1000 B.T.U.H. approved hourly rating or as indicated by the con-
ditions of listing of the furnace.
"The minimum unobstructed total area of the circulating air
supply openings or ducts to a blower-type warm-air furnace shall
be not less than two (2) square inches for every 1000 B.T.U.H.
hourly input rating of the furnace.
"The total area of the circulating air openings or ducts need
not be larger than the minimum sized circulating air opening or
openings as indicated by the conditions of listing of the furnace.
"(e) Dampers. Volume dampers shall not be placed in any warm-air
furnace circulating air inlet in a manner which will reduce the required
circulating air to the furnace.
"(f) Ducts for Blower-type Warm-air Furnace. Except as provided
in Subsection (g) of this Section, circulating air for every blower-
type warm-air furnace shall be conducted into the blower housing from
outside the furnace space by continuous airtight ducts.
"(g) Prohibited Sources. The circulating air for a heating system
shall not be taken from any of the following locations:
"l. Closer than 10 feet from any appliance vent outlet,
unless such vent outlet is 3 feet above the circulating air
inlet. V
"2. Where it will pick up objectionable odors, fumes,
or flammable vapors.
"3. A hazardous or insanitary location or a machinery
room as defined in this Code.
"4. From an area the volume of which is less than 25
percent of the entire volume served by such system, unless there
is a permanent opening to an area the volume of which is equal to
25 percent of the entire volume served. This permanent opening
when used to provide circulating air to a warm-air furnace shall
be of sufficient area to comply with this Section.
"EXCEPTION: Such openings when used for a warm-air
furnace in a dwelling unit may be reduced to no less
than 50 percent of the required circulating air area
provided the balance of the required circulating air
is taken from a room or hall having at least three
doors leading to other rooms served by the furnace.
-22-
"5. From a room or space having any direct-fired,
fuel-burning appliances therein.
"EXCEPTION: This shall not apply to:
1. A gravity-type heating system.
"2. A blower-type heating system complying with the
following requirements:
"Where the circulating air is taken from a room or space
having a volume exceeding one cubic foot for each 10
.B.t.u. fuel input rate of all fuel-burning appliances
therein.
"At least 75 percent of the conditioned air is
discharged back into the same room or space.
"A circulating air inlet is not located within 10
feet of any appliance firebox or draft diverter in the
same enclosed room or space.
"6. Closer than 10 feet from any vent opening for a
plumbing drainage system, unless the vent opening is at
least 3 feet above the circulating air inlet.
"7. A closet containing a direct-fired fuel-burning
appliance or a clothes, coat, linen or storage closet.
"(h) Screen. Every required circulating air inlet from
outside the building shall be covered with screen having 1/4-inch
openings.
"EXCEPTION: Any such circulating air inlet serving any
nonresidential portion of any building may be covered
with screen having openings not exceeding 1 inch in width.
"(i) Return Air Limitation. Return air from one dwelling
unit shall not be discharged into another dwelling unit through
the heating system."
SECTION 69.
That the second paragraph of Exhibit A of Section 707 of Ordinance
No. 6408 be, and the same is hereby amended to read as follows:
"The total area of the conditioned air ducts need not be
larger than the outlet plenum collar opening on the furnace."
SECTION 70.
That the last paragraph of Exhibit B of Section 707 of Ordinance No.
6408 be and the same is hereby repealed.
SECTION 71.
That Section 710 of Exhibit A of Ordinance No. 6408 be, and the same
is hereby amended to read as follows:
-23-
"Furnaces Installed on Roofs or Exterior Walls of Buildings
"Sec. 710. (a) General. Furnace installation on roofs or
exterior walls of buildings shall comply with the requirements for
roof and wall structures as specified in the Building Code, and
shall be listed or approved for such use.
"(b) Weather Protection. Unless listed or designed for outside
installation, every appliance located on the roof of a building shall
be in a penthouse complying with the requirements of the Building
Code, for roof structures, or shall be completely enclosed in a
weatherproof housing. This housing when constructed of metal shall
be of galvanized steel or aluminum not less 'than No. 24 U.S. Standard
gage supported on a substantial metal frame. The housing shall be
not larger than necessary to properly cover and provide a minimum
6-inch clearance around the appliance or appliances enclosed therein,
including all controls and draft hoods.
"(c) Ventilation. Every enclosure shall be provided with
ventilation openings complying with the requirements of Chapter 6
of this Part, together with means for proper ventilation of the
furnace draft hood relief opening or openings."
"(d) Clearance. Clearance of the furnace from combustible
construction shall be as specified in Section 711.
"(e) Platform. Every appliance located on a roof of a building
shall be installed on a substantial level platform. Whenever the roof
has a slope greater than 4 inches measured vertically to 12 inches mea-
sured horizontally, a level working platform not less than 30 inches in
depth shall be provided in front of the entire firebox and control sides
of the appliance. All sides of any working platform facing any portion
of the roof edge below the platform shall be protected by a substantial
railing 42 inches in height with vertical rails not more than 21 inches
apart, except that parapets at least 24 inches in height may be utilized
in lieu of rails or guards.
"(f) Catwalk. A catwalk not less than 16 inches in width and
provided with substantial cleats spaced not more than 16 inches apart
shall be provided from the roof access to every required working
platform at the appliance.
"EXCEPTION: This requirement shall not apply if the slope
of the roof is not more than 4 inches measured vertically to 12
inches measured horizontally.
"(g) Roof Scuttle Access. Required working platforms, railings and
catwalks may be omitted when access to the equipment is through a required
roof scuttle and all of the following provisions are met:
"1. The required scuttle is located immediately adjacent
to the control side of the equipment unit.
112. All controls, filters, burners, fans and motors are
accessible for service and repair within 2 feet of the edge of
the equipment platform on the scuttle side.
1. The equipment platform is not more than 20 inches
above the high side of the scuttle opening.
"4. A substantial working platform not less than 30 inches by
30 inches shall be provided directly below the scuttle at a point
not less than 30 inches or more than 32 inches below the high side
of the scuttle opening.
_24-
11
5. Scuttles located on other than the roof incline
side of the equipment unit shall have their lids or trap
doors hinged on the low side of the scuttle. Such lids or
trap doors shall be equipped with means to insure an opening
radius of not less than 90 degrees nor more than 100 degrees
from the closed position. Scuttle lids or trap doors and hard-
ware, when open, shall be capable of withstanding a 300-pound
lateral stress from the roof incline side.
"6. Access to such scuttles shall comply with Section 708.
"(h) Access. Every appliance installed in or on an exterior
wall of a building, which is so designed that the burners or controls
are serviceable only from outside the building, shall be readily
accessible.
"Every appliance located on the roof of any building shall be
readily accessible.
"EXCEPTION: A portable ladder or other portable
temporary means may be used for access to an appliance
located on the roof of a single-story portion of a
Group I or J Occupancy."
SECTION 72.
That Subparagraph 6 of the third paragraph of Section 802 of Exhibit
A of Ordinance No. 6408 be, and the same is hereby amended to read as
follows:
"6. In Group E, Division 4 Occupancies, devices
generating a spark or glow capable of igniting gasoline vapors
shall not be installed or used within eighteen (18) inches of
the floor."
SECTION 73.
That a subparagraph 7 be, and the same is hereby added to the third
paragraph of Section 802 of Exhibit A of Ordinance No. 6408 be, and after being
so added the same shall read as follows:
"7. In any Group E, Division 5 Occupancy, and Group F,
Division 3 Occupancy, unless the appliance is located at least
eight (8) feet above the floor."
SECTION 74.
That Subsection (c) of Section 807 of Exhibit A of Ordinance No.
6408 be, and the same is hereby amended to read as follows:
"(c) Unvented. Unvented fuel-burning room heaters shall
not be installed in any Group D, H or I Occupancy, nor shall
any such heater be installed in any building, whether as a new
or as a replacement installation, unless permitted by this Section.
"EXCEPTION: Unvented gas-fired room heaters,
excluding gas fired bathroom heaters, may continue
to be used in existing Group I Occupancies when approved
by the Building Official.
"Listed or approved unvented overhead room heaters may be
installed in any Group B, E, Division 4; Group E, Division 5i
Group F, G or J Occupancy, provided the installation conforms,
to all of the following requirements:
-25-
1. All portions of the heater are located not less
than eight (8) feet above the floor.
"2. At least two (2) unobstructed permanent ventilation
openings are provided to the room or space containing such
heaters. These openings shall open directly to the outside
of the building through the floor, roof or wall. The minimum combined
total area of these openings shall be at least one (1) square inch
for each 1000 B.T.U.H.'s fuel input of the heater or heaters, with
a minimum total area of one hundred (100) square inches. One-half
of the required ventilation openings shall be above the heater or
heaters, and one-half shall be located below the heater or heaters.
"EXCEPTION: Where approved by the Building Official ,
provisions may be made to exhaust the products of combustion
to outside the building by mechanical means.
1. The heater shall be safely and securely supported with hangers
and brackets of noncombustible material and installed with clearances
from combustible material as specified on the required manufacturer's
label .
SECTIO.d 75.
That a new Section 808 bepand the same is hereby added to Exhibit B
of Ordinance No. 6408 and after being so added the same shall read as follows:
Infra-Red Heaters
"Sec. 807. Indirect vented gas-fired heaters (Infra-Red), not
requiring an individual flue pipe, shall be installed only in spaces
which have a minimum infiltration of one air change per hour for
general ventilation. Provision shall be made for ventilation air to
be discharged from high points under the roof or other approved location.
"l. Threshold value of CO2 shall not exceed 5,000 ppm in
accordance with ASHRE GUIDE Minimum ventilation requirements to
maintain this condition when burning either natural gas or propane
is 4.2 C.F.M. per 1 ,000 BTU's.
"2. When automatic recycling controls are not an integral part
of the heating unit, it shall be furnished with 100 percent shut off.
"3. Infra-red heaters, equipped with a vent outlet shall be vented
to the outside of the enclosing building. Listed vent cap shall be
increased one size larger than the vent pipe, using an approved reducer.
Method of venting shall conform to the manufacturer's recommendations."
SECTION 76.
That a paragraph be added at the end of Section 901 of Exhibit A of
Ordinance No. 6408 be, and after being so added the same shall be,and read
as follows:
"Gas venting systems serving appliances equipped with draft
hoods and appliances listed for use with Type B vents may be designed
in accordance with tables in Appendix C, Chapter 9, when such design
method has been approved by the Building Official ."
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` SECTION 77
! That Section 904 of Exhibit A of Ordinance No. 6408 be, and the
I
'i same is hereby amended by the addition of a new paragraph, such paragraph
to immediately follow the EXCEPTION to the first paragraph, such Section 904
and such paragraph after being so added, shall read as follows:
"Portions of vents which extend through occupied spaces
shall be enclosed to avoid personal contact with or damage to
1 the vent."
SECTION 79
That Section 914 of Exhibit A of Ordinance No. 6408 be,
and the same is hereby amended to read as follows:
"Sec. 914 (a) Metal Chimneys--General Limitations.
Unlisted single-wall metal chimneys (smokestacks) SO)
not be used within a dwelling unit of a Group H or I
Occupancy.
"l. Metal chimneys shall not be carried up inside
ventilating ducts unless such ducts are constructed
and installed as required by this Code for chimneys
and which are used solely for exhaust of air from
the room or space in which the appliances served by
the metal chimneys are located.
"2. Design. Metal chimneys shall have a minimum
thickness equal to No. 10 Manufacturers' Standard
gauge steel and shall be designed and constructed
as specified in this Chapter, and Chapters 23 and
27 of the Building Code, Volume 1.
"3. Construction. Unlisted metal chimneys shall
be riveted or welded and, unless structurally self-
supporing, shall be guyed securely or firmly an-
chored to or otherwise supported by the building
or structure served thereby. All joints shall be
liquid tight or of such a design that liquid will
drain to the interior of the chimney.
"4. Lining, Metal chimneys shall be lined as re-
quired by Table No. 9-C.
"5. Termination. Metal chimneys shall terminate
as required by Table No. 9-C.
"6. Clearance. Clearance from construction shall
be in accordance with Table No. 9-C and the appli-
cable requirements for each classification of chim-
ney as required by this Chapter.
"7. Protection. Where such chimney passes through
a ceiling or roof constructed of combustible mate-
rials, it shall be protected by an approved venti-
lated thimble extending not less than nine inches
below and nine inches above such ceiling or roof
construction. Such thimbles shall be of a size to
provide a clearance on all sides of the chimney of
not less than eighteen inches; provided that, for
chimneys of low-heat appliances, the clearance may
be reduced to not less than six inches.
Pt
"B. Support. Metal chimneys shall be supported
on properly designed foundations of masonry or
reinforced concrete or on noncombustible material
having a fire resistance rating of not less than
three hours, provided such supports are independ-
ent of the building construction and the load is
transferred to the ground.
"9. Enclosure Required for Interior Chimneys.
Metal chimneys, or parts thereof, in a building
other than a one-story building shall be enclosed
above the story in thich the appliance served
thereby is located, in walls of noncombustible
construction having a fire-resistive rating of
not less than one hour, if the building is less
than four stories in height, and not less than
two hours, if the building is four stories or more
in height with a space on all sides between the
chimney and the enclosing walls sufficient to
render the entire chimney accessible for examina-
tion and repair. The enclosing walls shall be
without openings.
"EXCEPTION: Doorways equipped with a fire assem-
bly having a one-hour fire-resistive rating may
be permitted at each floor level for inspection
purposes.
" (b) Metal Chimneys for Building Heating and
Industrial Type or LowHeat Appliances. Where a
metal chimney used for building heating and indus-
tiral type-low heat appliances is located in the
same story of a building as that in which the ap-
pliances connected thereto are located, it shall
have a clearance of not less than 18 inches from
a wall of wood frame construction and from any
combustible material. Such interior metal chim-
neys over eighteen inches in diameter shall have
a clearance of not less than four inches, and
those eighteen inches or less in diameter a clear-
ance of not less than two inches from a building
wall of other than wood-frame construction.
"l. Where a metal chimney serving only building
heating and industrial type or low-heat appliances
passes through a roof constructed of combustible
material, it shall be guarded by a ventilating
thimble of galvanized iron or approved corrosion-
resistant metal extending not less than nine inches
below and nine inches above the roof construction
and of a size to provide not less than six inches
clearance on all sides of the chimney; or the com-
bustible material in the roof construction shall
be cut away so as to provide not less than eighteen
inches clearance on all sides of the chimney, with
any material used to close up such opening entirely
noncombustible.
23
" (c) metal chimney's for Medium Heat Ap2li-
ances'. Metal chimneys for medium-heat appliances
and producing flue gases having a temperature
above 10000 F. , measured at the entrance to the
chimney, shall be lined with medium duty-firebrick,
U.B.C. Standard No. 37-1, or the equivalent laid
in fire-clay mortar, U.B.C. Standard No. 37-1, or
the equivalent. The lining shall be at least two
and one-half inches thick for chimneys having a
diameter or greatest cross-section dimension of
eighteen inches or less and shall have a thickness
of not less than four and one-half inches laid on
four and one-half inch bed for chimneys having a
diameter or greatest cross-section dimension
greater than eighteen inches. The lining shall
start two feet or more below the lowest chimney
connector entrance and shall extend to a height
of at least twenty-five feet above the highest
chimney connector entrance.
"l. where a metal chimney serving a medium-heat
appliance passes through a roof constructed of
combustible material, it shall be guarded by a
ventilating thimble of galvanized iron or ap-
proved corrosion-resistant metal, extending not
less than nine inches below and nine inches above
the roof construction, and of a size to provide
not less than eighteen-inch clearance on all sides
of the chimney.
"2. Where a metal chimney used for medium-heat
appliances is located in the same story of a
building as that in which the appliances con-
nected are located, it shall have a clearance of
not less than thirty-six inches from a wall of
wood-frame construction and from any combustible
material. Such interior metal chimneys over
eighteen inches in diameter shall have a clear-
ance of not less than four inches and those
eighteen inches or less in diameter a clearance
of not less than two inches from a building wall
of other than wood-frame construction.
" (d) Metal Chimneys for High-Heat Appliances.
Metal chimneys for high-heat appliances shall be
lined with high duty firebrick, U.B.C. Standard
No. 37-1, or the equivalent, not less than four
and one/halt inches thick, laid on the four and
one-half inch bed in refractory mortar, U.B.C.
Standard No. 37-1, or the equivalent. The lin-
ing shall start two feet or more below the lowest
chimney connector entrance and shall extend to
a height of at least twenty-five feet above the
highest chimney connector entrance. Chimneys ter-
minating twenty-five feet or less above a chimney
connector entrance shall be lined to the top.
29
" (e) Metal Chimneys for Incinerators.
"l. Residential-Type Incinerators. Galvanized
steel pipe not less than No. 10 galvanized sheet
gauge number or other equivalent nonconir,,;stible
fire and corrosion-resistant material m,a be
used for residential-type incinerators installed
in locations such as open sheds, breezeways or car-
ports, provided the pipe is exposed and readily ex-
aminable for its full length and clearance not less
than eighteen inches is maintained from .combustible
material. The pipe shall extend at least three
feet above the highest point where it passes by or
through a roof and at least two feet higher than
any portion of a building within ten feet. If the
pipe passes through a roof constructed of combusti-
ble material, it shall be guarded by a ventilating
thimble of galvanized steel or approved corrosion-
resistant noncombustible material extending not
less than nine inches below and nine inches above
the roof construction, and of a size to provide
not less than six-inch clearance on all sides of
the pipe; or the combustible material in the roof
construction shall be cut away so as to provide
not less than eighteen-inch clearance on all sides
of the pipe, with any material used to close up
such opening entirely noncombustible.
"2. Commercial and Industrial-Type Incinerators.
Metal chimneys for commercial and industrial-type
incinerators shall be lined with medium duty fire-
brick, U.B.C. Standard No. 37-1, or the equivalent,
not less than four and one-half inches thick laid
on the four and one-half inch bed in refractory
mortar, medium duty, U.B.C. Standard No. 37-1, or
the equivalent. The lining shall start at the base
of the chimney and extend continuously to the top.
"3. Metal chimneys of commercial and industrial-
type incinerators shall extend at least three feet
above the roofs, measured from the highest point at
which the metal chimney passes through the roof.
in any case, the chimney shall extend at least two
feet higher than any portion of a building within
twenty-five feet.
"4. Metal chimneys for commercial and industrial
incinerators shall be installed to provide clear-
ances as specified in Section 914(c) , Metal Chim-
neys for Medium-Heat Appliances.
" (f) Spark Arrestors. Chimneys serving in-
cinerators shall terminate in a substantially con-
structed spark arrestor having an area not less
than four times the net free area of the chimney
it serves. Openings shall not permit the passage
of spheres having a diameter larger than one-half
inch nor block the passage of spheres having a diam-
eter of less than three-eighths inch. Spark Arrestors
shall be adequately supported and secured.
30
" (g) Enclosures. metal chimneys, serving
flue-fed, chute-fed, commercial or industrial-
type incinerators, extending through any story
of a building above that in which the connected
incinerator is located, shall be enclosed in
such upper stories within a continuous enclosure
constructed of materials which are not combusti-
ble, such as masonry. The enclosure shall extend
from the ceiling of the incinerator room to or
through the roof so as to retain the integrity
of the fire separations as required by applicable
building code provisions. The enclosure shall
have a fire-resistance rating of not less than
one hour if the building is less than four stories
in height, and not less than two hours if the
building is four or more stories in height. All
openings into the enclosing walls shall be pro-
tected with a self-closing fire assembly having
a fire resistive rating of not less than one and
one-half hours.
SECTION 78
That Table 9-C of Exhibit A of Ordinance No. 6408
be, and the same is hereby amended to read as follows:
9-C-71.1
TABLE NO.9-C—CONSTRUCTION,CLEARANCE AND TERMINATION REQUIREMENTS FOR UNLISTED
SINGLE WALL METAL CHIMNEYS
TERMINATION CLEARANCE
ABOVE ANY
PART OF COMBUSTIBLE NONCOMBUSTIBLE
WALL LINING BUILDING
CONSTRUCTION CONSTRUCTION
ABOVE ROOF WITHIN INTERIOR EXTERIOR INTERIOR EXTERIOR
CHIMNEYS SERVING MINIMUM THICKNESS OPENING 10' 25' 50' INST. INST. INST. INST.
Building Heating 1.2
and Intlostrial type
IVI fgs
Low-llvatAppli-
antes(IO(H) 1". sid None 31 2' 18, 131,
lig-1.100 J." Ili g1k.
Up to 18"diameter,2"
Up to 18" Over IH"dianacter,4"
Medium-lIcat Indus- hffgs dia—2/,'
trial',3 Type Appli. Std Over 18" 10` 10, 36" 24"
antes(2000°F. 10 ga. 4%'on
Maximum) 41/2"bed
Ifigh-II.-M Indus- M rgs 4%"laid
trial I,'I'yIu-Appli- Sid on 4t5" 20' 20' See rocitnoto
;in",,%(()v,r 20001,'.) 10 ga. bed
M fgs
itesoentiarrype, SO None 3' 21 Not Per- Not Per- 4"Incinerator ]0 ga. milled 18" milted
chot-Ilvd,Flu(.- M Fg% 4'/.'"1 '1 3'aliove
FC(12.5 Commercial SO on L `41/21lc sloping roof 10, 361, 24" Up to 18"diameter,2"
or I ndustriall'ypu 10 ga bed or 8'ahove Over 18"diameter,4"
Incirwraturs flat roof
'See Tril1le No. 11-A for types of appliances to he used with cacti typo of chimney.'S I-min
a :,I ffrom bottom ,,top of chimney,'
IJ.i.,g d Lan 24hb,l—con.-to,to 24 fc,,t
'Clcarnnec hall he a, by the&Agri engineer and shall have sufficient clearance from buildings and structures to avoid overheating
oarbustihle
....lun;.. ........ !Ifi0'F.).
'Spark--t-s h.,Il he provided i u accordance with Subsection 914 (f).
31
"(c) Joints and Seams of Round Ducts. Joints and
seams of round ducts shall be made substantially airtight.
Joints shall have a contact lap of at least one and one-
half (1-1/2) inches and shall be first sealed in place with
duct tape, after which joint shall be mechanically fastened
by not less than three (3) metal screws left visible for
inspection.
"(d) Metal. Every duct, plenum or fitting of metal
shall comply with the specifications in Table No. 10-A or
Table No. 10-B.
"EXCEPTIONS: Ducts, plenums and fittings
for systems serving single dwelling units
may comply with Table No. 10-C.
"(e) All round duct, fittings and take-offs from rec-
tangular ducts or plenums such as starting collars, reducers,
branch take-offs, elbows, stack, grill heads, etc., shall be
of approved factory or shop manufacture. Round duct shall
terminate in collar of grill heads and ceiling outlets. Each
piece of round duct shall have one end crimped.
"(f) Tin. Existing tin ducts may be used when cooling
coils are added to a heating system, provided the first ten
(10) feet of the duct or plenum, measured from the cooling
coil discharge, are constructed of metal of the gage thick-
ness set forth in Table No. 10-A, No. 10-B, or No. 10-C of
this Chapter or are of approved material and construction.
Tin ducts completely enclosed in inaccessible concealed
areas need not be replaced. All accessible ducts shall be
insulated to comply with Table No. 10-D of this Chapter.
For the purpose of this Subsection, ducts shall be con-
sidered accessible where the access space is thirty (30)
inches or greater in height.
"(g) Vibration Isolators. Vibration isolators in-
stalled between mechanical equipment and metal ducts (or
casing) shall be made of woven asbestos or approved mater-
ial and shall not exceed ten (10) inches in length.
"QUALITY OF MATERIAL.
"Sec. 1003. Galvanized steel coating shall be of a
minimum 1.25 ounces per square foot, and shall conform to
specifications for zinc-coated galvanized steel sheets,
coils, or cut lengths meeting the requirements of U.M.C.
Standard No. 4-2.
"Every joint and seam and all reinforcement for every
metal duct and plenum shall be as set forth in Table No.
10-A or Table No. 10-B and shall be substantially airtight.
Joints and seams for No. 28 and No. 30 gage ducts shall be
as set forth for No. 26 gage ducts in Table No. 10-A.
"Joints and seams for No. 28 and No. 30 gage round
ducts shall be as set forth in Table No. 10-B.
"Every joint and seam and all reinforcement for every
nonmetallic duct and plenum shall meet with the conditions
of prior approval for any nonmetallic duct system as speci-
fied in Section 1002. Joints and seams shall be substan-
tially airtight.
"INSTALLATION OF DUCTS.
Sec. 1 a Metal Ducts. All ducts shall be se-
curely fastened in place at every change of direction and
as set forth in Table No. 10-E. Vertical rectangular ducts
and vertical round ducts shall be supported as set forth in
Table No. 10-E, Part I. All riser ducts shall be held
in place by means of metal straps and/or angles and charn is
to secure the riser to the structure.
33
"Metal ducts shall not be installed in or within
four (4) inches of the ground. Metal ducts when installed
in or under concrete slab shall be encased in at least two
(2) inches of concrete.
"Supports for rectangular ducts as set forth in
Table No. 10-E, when suspended from above shall be in-
stalled on two opposite sides of each duct and shall be
riveted, bolted, or metal screwed to each side of the
duct at not more than the intervals specified.
"Horizontal round ducts forty (40) inches or less
in diameter when suspended from above shall be supported
at intervals not more than as set forth in Table No. 10-E
with one (1) hanger installed to comply with the require-
ments listed below:
"l. Ducts shall be equipped with tightfitting
circular bands extending around the entire
perimeter of the duct at each specified
support interval.
"2. Circular bands shall be not less than one
(1) inch wide nor less than equivalent to
the gage of the duct material it supports.
"3. Each circular band shall be provided with a
suitable means of connecting to the suspend-
ing support.
"4. Ducts shall be braced and guyed to prevent
lateral or horizontal swing.
"(b) Nonmetallic Ducts. Approved Class 1 air ducts
may be installed in any occupancy covered by this Code.
Approved Class 2 air ducts may be installed only in
dwellings or apartment houses where the duct system serves
not more than one dwelling unit.
"Nonmetallic ducts shall not be used for vertical
risers in air duct systems serving more than two stories.
Such ducts shall not penetrate construction where fire
dampers are required.
"A Class 1 air duct shall not be installed in or on
the ground, in masonry or in concrete, except where in-
stalled as a liner inside of concrete, tile or metal pipe;
nor shall they be installed where exposed to physical damage.
"Class 1 air ducts shall not be installed within three
(3) feet of a heat exchanger.
"Ducts shall be labeled by the manufacturer as to
their compliance with U.M.C. Standard No. 10-1 and the
class designations thereof.
"INSULATION OF DUCTS.
"Sec. 1005. Every conditioned air metal supply duct
and plenum shall be insulated with not less than the
amount of insulation set forth in Table No. 10-D, except
for ducts and plenums used exclusively for evaporative
cooling systems.
34
"Only approved materials shall be used on or within the
ducts and plenums for insulating, sound deadening or other
purposes. All such materials shall have a mold, humidity and
erosion resistant face that has met the requirements of
U.M.C. Standard No. 10-1. Such materials shall be allowed
in occupancies as for Class 1 and Class 2 air ducts based
upon their flame-spread and smoke developed ratings. Duct
systems operating at velocities in excess of 2000 feet per
minute shall be fastened with both adhesive and mechanical
fasteners, and all exposed edges shall have adequate
treatment to withstand the operating velocity.
"Insulations applied to the exterior surface of metal
ducts located in buildings of Types I and II construction
shall have a flame-spread of not more than 25 and a smoke
development rating of not more than 50 when tested as a
composite installation, including insulation, facing mat-
erials, tapes and adhesives as normally applied.
"FIRE DAMPERS.
"Sec. 1006. See U.B.C. Standard No. 43-7 and Chapter
43 of the Building Code, for the construction and installa-
tion for duct openings in walls and ceilings.(U.B.C. Stand-
ard No. 43-7 is reprinted in this Code.)
"VENTILATING CEILINGS.
"Sec. 1007 (a) General. Perforated ceilings may be
used for the supply of conditioned air within the limita-
tions of this Section. Exit corridors when required to be
of fire-resistive construction by Section 3304 (g) of the
Building Code, shall not have ventilating ceilings.
"(b) Requirements. Ventilating ceilings shall com-
ply with the following provisions:
"l. The suspended ceiling material shall have a
Class 1 flame-spread classification on both
the exposed and unexposed sides. Such classi-
fication shall be determined in accordance
with the procedures set forth in the Building
Code.
"2. Lighting fixtures recessed into the ventilating
ceiling shall be of an approved type for that
type of installation.
"3. Except for the ceiling material, plenums shall
be lined with materials as specified in Section
1002 (a) of this Code or approved noncombustible
material. Combustible material shall not be
exposed in such plenum.
"The conditioned air supply in such plenum shall
have a temperature of not more than 125°F., nor
less than 50°F.
"4. The suspended ceiling supports shall be of non-
combustible materials.
"5. Where necessary to install electrical wiring
within the plenum, all wiring shall be in non-
combustible enclosures regardless of the volt-
age carried.
"USE OF UNDERFLOOR SPACE AS SUPPLY PLENUM.
"Sec. 1008. If approved by the Building Official be-
fore installation, an underfloor space may be used as a
supply plenum provided:
35
"l. Use of such spaces shall be restricted to one-
story portions of single family residences.
"2. Such spaces shall be not more than twenty-four
(24) inches in height to the bottom of floor
joist; shall be cleaned of all combustible
material, and shall be tightly and substantially
enclosed.
"3. The enclosing material of the underfloor space
including the side wall insulation shall be not
more flammable than one (1) inch (nominal) wood
boards (flame-spread classification of 200).
Combustible ground cover shall be covered over
with at least two (2) inches of sand or other
noncombustible material.
"4. Access shall be through an opening in the floor
and shall be not less than 24 inches by 24 inches.
"5. The furnace supplying warm air to such space
shall be equipped with an automatic control which
will start the air circulating fan when the air
in the furnace bonnet reaches a temperature not
higher than 150°F. Such control shall be one
that cannot be set higher than 150°F.
"6. The furnace supplying warm air to such space
shall be equipped with an approved temperature
limit control that will limit outlet air tem-
perature to 200°F.
"7. A noncombustible receptacle shall be placed below
each floor opening into the air chamber, and such
receptacle shall conform to the following;
"A. The receptacle shall be securely suspended
from the floor members and shall not be
more than eighteen (18) inches below the
floor opening.
"B. The area of the receptacle shall extend
three (3) inches beyond the opening on
all sides.
"C. The perimeter of the receptacle shall
have a vertical lip at least one (1)
inch high at the open sides if it is
at the level of the bottom of the
joists, or three (3) inches high if
the receptacle is suspended.
"8. Floor registers shall be designed for easy re-
moval in order to give access for cleaning the
receptacles.
"9. Exterior walls and interior stud partitions
shall be fire-stopped at the floor.
"10. Each wall or floor register shall be connected
to the air chamber by a register box or boot
with shield directly below the register opening.
1 1. Supply ducts to the air chamber shall terminate
not less than six (6) feet from the plenum
chamber.
36
"12. The entire ground surface of the underfloor
space shall be covered with a vapor barrier
consisting of a minimum thickness of four
(4) mils.
"13. Fuel gas lines and plumbing waste cleanouts
are not located within the space.
"AUTOMATIC SHUTOFFS.
Sec. 1009. A device complying with U.B.C. Standard No.
43-6, which will detect products of combustion other than
heat and which will shut down the equipment shall be placed
in the main circulating air duct on the downstream side of
the filters and so located as to operate in case of smoke in
the air stream, or such devices may be installed in each room
or space served by a return air duct.(U.B.C. Standard No.
43-6 is reprinted in this Code.)
"This requirement is applicable to each single system
providing heating or cooling operating in excess of 10,000
cubic feet per minute in Groups A, B, Division 1; B, Divi-
sion 2; C, D, and H Occupancies and in Group F, Division
2 Occupancies more than three stories in height or exceed-
ing 36,000 square feet in basic floor area. Whenever such
a system serves more than one occupancy group, such devices
shall be provided.
"EXCEPTION:1.When all rooms have direct
exit to the exterior of the building, such
devices are not required."
SECTION 83
That Exhibit B of Ordinance No. 6408 be, and the same is hereby
amended by the addition thereto of Chapter 10, "Ducts", and such chap-
ter, after being so added, shall read as follows:
"Sec. 1009* * *
"EXCEPTION*
"2. Smoke venting conditioned air systems shall omit
the above devices. A smoke venting conditioned
air system is one which is actuated by the pres-
ence of smoke to automatically discharge such
smoke charged air to the outside."
37
TABLE NO. 10-D--MINIMUM DUCT INSULATION REQUIREMENTS FOR HEATING
AND COOLING DUCTS.
INSULATION MATERIALS
EXTERNAL INTERNAL ADHESIVES,
DUCT LOCATION DUCT DUCT TAPES,
INSULATION INSULATION ACCESSORIES
Supply and return ducts
on roof or exposed to
weather A X 25/50
Supply and return ducts
in attics B Y 25/50
Supply ducts under
floors, in basements,
shaft enclosures and
furred spaces C Z 25/50
Return ducts under
floors, in basements,
and within conditioned
areas NONE REQUIRED
Supply ducts within
conditioned areas NONE REQUIRED
Supply and return ducts
underground and within
vertical wall spaces NONE REQUIRED
LEGEi1D
"A" 2" thickness of faced fiber glass duct wrap, 1" thick-
ness of foamed plastic or rubber based semi-rigid
closed cell board or other approved board.
"B" 2" thickness of faced fiber glass duct wrap on metal
ducts or fiber glass duct 1" thick.
"C" 1-1/2" thickness of faced fiber glass duct wrap on metal
ducts or fiber glass duct 1" thick.
"X" 2" thickness of thermal and acoustical fiber glass duct
liner.
"Y" 2" thickness of thermal and acoustical fiber glass duct
liner in metal ducts or fiber glass duct 1" thick.
"Z" 1" thickness of thermal and acoustical fiber glass duct
liner in metal ducts or fiber glass ducts 1" thick.
38
2. Thermal conductivity (K) at 75'F. shall not be greater than
.30. K=B.T.U. in thickness/hr./sq. ft./deg. F. (ASTM C-518
test).
3. All duct liner shall be coated on the air flow side with a
fire-resistant coating, and comply with the require-
ments of NFPA-90A.
4. Duct lining shall be continuous in all portions of the duct.
5. Application of liner to duct shall be by means of 100% cover-
age with adhesive and mechanical fasteners in accordance with
SMACNA Standard. All leading edges and transverse joints
shall be coated with adhesive.
6. Adhesives shall conform to Adhesive and Sealant Council Stand-
ards ASC-A-7001A-1971 and Fasteners to Mechanical Standard
N.F.-1-1971 and shall be approved.
FIBER GLASS DUCTS. All fiber glass ducts shall conform to the following:
1. Shall be Class 1 Air Duct by U.L. 181 as required by NFPA-90A,
and conform to U.M.C. Standard 10-1. Facing material shall
have a perm rating not greater than .05 perms.
2. Shall not be installed where they will be exposed to the
weather.
3. Do not require additional insulation. As constructed, they
are acceptable for the insulation requirements of Table No.
10-D.
4. Thermal conductivity (K) at 75°F. shall be not greater than
.23. K=B.T.U. in thickness/hr./sq. ft./deg. F. (ASTM C-518
test).
5. All joints shall be stapled and taped in accordance with the
SMACNA Standards. Tape shall also meet Class I Air Duct
approval by U.L. 181 as required by NFPA-90A.
6. Ducts are approved for velocities in accordance with the manu-
facturer's rating but in no case in excess of 2400 feet/minute,
a maximum pressure of 2" water gauge and air temperature shall
not exceed 250°F.
7. All installations of rectangular fiber glass duct board, Types
475, 800 and 1400 shall be reinforced and suspended in accord-
ance with SMACNA "Fibrous Glass Duct Construction Standards",
latest edition.
39
DUCT WRAP. All faced fiber glass duct wrap shall conform to the following:
1. External insulation on ducts used for cooling, shall be
covered with a vapor barrier having a maximum permeance
of 0.05. When aluminum foil is used only as a vapor barrier,
it shall have a minimum thickness of 2 mils. Insulation, in-
cluding covering or coating, shall have a flame spread classi-
fication not to exceed 25 and a smoke developed rating not
to exceed 50 when tested in conformance with ASTM Designation
E84, and shall carry a label indicating the fire hazard
classification.
2. The density shall be not less than 3/4 pound per cubic
foot or the faced material shall have a minimum R value of R-6
for 2" thick wrap and R-5 for 1-1/2" thick wrap.
3. Thermal conductivity (K) at 750 shall not be greater than
.30. K=B.T.U. in thickness/hr./sq.ft./deg. F. (ASTM C-518
test).
4. The U.L. labeling requirement may be waived by the Building
Official, when the manufacturer provides an approved acceptable
continuous marking on the facing of his product, indicating the
material conforms to a rating of 25 flame spread and 50 smoke
developed.
5. All nominal 2" duct wrap on round duct shall be not less than
1-1/2" thickness after application.
The same insulation thickness of 1-1/2" applies to rectangular
duct except on the corners, in which area 3/4" thickness is
acceptable.
6. All nominal 1-1/2" duct wrap shall be not less than 1" thick-
ness after application.
7. Insulation shall be snugly wrapped on ducts with all circum-
ferential joints butted with facing lapped and stapled. Longi-
tudinal joints shall have the fiber glass removed from the
facing a minimum distance of 2". The joints of the fiber glass
duct wrap shall be butted with the 2" facing overlapped and
stapled.
Insulation on rectangular ducts over 24" wide shall be provided
with suitable mechanical fasteners at not more than 18 O.C., to
secure insulation on the bottom.
8. Duct wrap exposed to weather shall be sealed with approved
sealant and weatherproofed in a manner indicated below or as
approved by the Building Official.
Apply coat of weatherproof mastic and embed into wet tack
coat a layer of open weave glass cloth. Smooth membrane to
avoid wrinkles and overlap all seams at least 2". Apply
finish coat of same type mastic. The total thickness of
coating shall be a minimum of 1/8".
9. Duct wrap shall be interrupted at the area of operation of
a fire damper or fire door. Duct wrap and linings shall
also be interrupted at the immediate area of operation of
heat sources in a duct system involving electric resistance
of fuel-burning heaters.
DUCT LINER. All fiber glass duct liner shall have the nominal density of
1-1/2 pounds per cubic foot and shall conform to the following:
1. Materials shall not exceed a flame-spread of 25, smoke devel-
oped of 50, without evidence of continued progressive com-
bustion.
-40-
!ABLE NO. LO A--CONSTRUCTION Of TAU S IOR RCCTANCUTAR SlITLT METAL DUCTS FOR LOW PRESSURE SYSTEMS WHERE
VIIOCIIIIS DO NOT IXCILD 2000 IItT Pill MINUTE
!•b. 1...•..+ae.in L:a." d 2 tnche+Water('olmu.I.IIt,,I tYnll'I Ilirkrirss Shall he't'wo Cagers
L Ivaa ier Thauc.Sol Vol lb ill'Lhi,'I nhlr.
I)uel.perifivul(,iu,.hoar here Jlrr uplrlicrcldrvuheo duel.Luger!Lau IN io<du•s arr c•rusc hi-okel(,Where erox bnv(kilig Is not
u,ed, duct wail .hall Ire I—,ca(;rY braairr Jilt duets 19 iurhr,through 60 inche%wide little%%longitudinal klondinat
a•:uu,nro
I MINIMUM METAL GAGES
Itool
U.S. Aluminum Elip or Duct PERMISSIBLE GIRTH JOINTS ANB LONOITUOINAL SEAMS
mandard 8 and S Cold Oimcnsion
Gate Gape Rolled (In Inches)
20 24(.020) 10 oa. Llp lh rot Jllt 12 111ive Slip,Plain"S"Slip,or I"l'cxket I.oak
Cl thnm);b IN I)rive Still.Plain"S"Slip,or I"Packet Lock
~ Ilenttne(I"S•Slip,1"liar Slip,or I"Pockct Lock on 5'centers
2Q 22 1.025) 24 oz Flee o led"S"Slip,I"Bar Slip,or 1"Pocket Lock on 10'centers with l"x 1"x
( - 19 through 30 1."aulgles on"niter luu•botwcen
I lrnnnod"S"Slip,1"❑ar Slip,or 1"P(wkct Lock on 10'centerswith Cross Break
I"Standing Svaui fin 5'1ontora
I"Bar Shp,Hvinhmcrd Ilar Slip,or Pocket Lock on 5'centers
i 1"Bar'slItt Bc-iufurc.d Bar Slip,or Pocket Lock on 10'centurs with 1"x t"x
."a.Jgles nit a enter title between
31 thnnigh 42 1"Slviding Seam no 5'routers
lnsidc L.uiigit(aliu:d St.-ding Scams with 1"x 1"x ra"angles on 5'center on
22 201.032) 32o2. cztellot
I'/'"Bar Slip,Ilcudorcc it Bar Slipp or Pocrket Lock on 4'centers
43 tbraigh 54
1(ri"I_.•xI Ilar Still, Nrioforcoil Bar Sli tor Pocket Lock on 8'centers with I%'x
1 •`
angb's Jill center line •hvicen
I',z"Bar Slip,R einfureevl Bar Slip,or Pocket Lock on 4'centers with Cross Break
l'z"Standing Scam uu 3'ecuters
i 20 is LI10; if;•u .55 throtigb IN) lu,idr I.auyphulin:d Standing Scato with 1'f•"x Lai"x 9fi"anglers on 4'centers
.I Jill eilrnur
Table No 10 A(Conf nticdl
MINIMUM METAL GAGES
feel—
U.S. 1 Aluminum Copper Duct PERMISs1UEt GIRTH JOINTS AND LONGITUDINAL SEAMS
Standard 8 and S cold Dimenslen
Gate ' Gate Railed (in Inches)
tic infun...i It.,, Slq,,Augic Slip.Alt-oad..Bar.Slip,or Angle fivn Ifor,I,]I• , 1
I ax k Jill I conhvs nsiu(e I Sz"x I'r"x '/x" re'inforvoig auglrs and du
I'.."A I'. A '�"at,l;lJ.J,11 L'.•nt'r boo b0w".1,
B<•udun,.I It;,,tihp..Aupab•Slip,Alt.niato Bar Slip,or Attgl.lieiufur...I P 1,r1
20 18(,040)1 36 oz. 61 through 84 ).,x-k fin .S r.nt"rs wing 114"x l'Fe"A '/n" n•infor-mg ;I...O'% .old d6
1' "TI'�", '."' allglvs2'fill(entersinhetwe.0
A,w1v lirinffir.rd Stmidiog Spam im 2' centers ttsiug I'c`x I'z'
ioinfur,uiy(:nncl,s
Imidr I.un.dwlul.d Sl,nuh.,g Scant•.Willi I'.••. I(:' a J. .o.gl...nn 2 .,J
Ices nu rUru„i
Companion A„gL .A,,glr Slip or Angle Reinforced 1'4x-ket Lot k u,wg 1' a
( 1'c"c ,;"cenip;mhni or reinfureiug angles on 4'centers with I'c"x I'c a
";nigh",nu renter line b.tweon
Conipa im- kogles,Angle Slip or Anglc lieinforc•ed Pocket Imck using I': .v
85 through 96 1' s "ronip;udoii or reinforc•iog:11191cs on 8'venters with I'z" x 1': .
auJ�l-s on^ ,,enters in bctwe.n
I'z" Bei4or d Strmdiug Spam on 2'centers using 112"x I a
n•in(un-n V'auntic.
Inr.i,fr I.ullpdu((inal Stauding Seanis with 1!i•"x 1!i"x !�•" a"gh•. ,J,J 3'
(-cut.q .,.i c,t'aior
18 16(.050) i 48 oz.
Cnuipani m AnJ'Ics,Angle Slip or Angle Reinforced Pocket lark using .2"A
'i"comp,uuun in reinforcing angles on 4',,enters with 2"x 2"x '(";oWl .
fin c•eut.'r line b.tweeo
Companion Angl-.Anglo Slip or Angle Reinforced Pocket Luck using 2",2
Over 08 "'"coinpa'niou or reinforcing angles on 8'centers with 2"x 2"It 'c"aikLi s
2'fin canter line between
I!4"Angle Raioforvml Standing Scam on 2'centers using 2"x 2"x It` rein
furring nigh.,
in.tide Lot(gihrdioal Standing Seams with 2"x 2"x '4"m(gles on 2'...... r,
exterior —
41
TABLE NO. 10•B—CONSTRUCTION DETAILS FOR ROUND AND FLAT-OVAL DUCTS (LOW, MEDIUM AND HIGH PRESSURE)
ALUMINUM
DUCT IS AND S
GACC STEEL-GALVANIZED SHEET GAGE
msierEx MAXIMUM r ter Pressure Llsr i__uref - -—- Medium and High Preswe GIRTH JOINTS,
WIDTH
(In Inches) Spiral Longitudinal Welded Medium and"ISO heinlv%ug,mai m".n
Round Round flat-Dnl seam Seam fillings Pressure, Sgaciag and Aagle sue
Up to 9 2.1 26 24 26 24 22 3"Slip Nnne
9 to 14 24 1 20 24 24 22. 20 4"Slit) \nu•
i
14 to 23 22 24 22 24 22 20 4"Slip N......
23 to 37 20 22 20 22 20 20 1"Slip N,mr
37to51 18 20 1R 20 20 18 1'i"x I',.i"x 1/n» I'+"x l^;r" '•
Flange ou;
51to61 10 IS 18 X 18 18 T u..xlii"xl,4" Iru••xii .� ;•
Flanste an 72"
61to84 14 16 . 14 X 16 16 1?a"xx '/<" 1 xilc"x .
19ango I rill48"
'For low pressure systems any of the following joint, ore accr•prnhin; butt dip;pipe dip;pipe Inek;mfl etip%ssap sNpt plrnnm rock and
eenspanien Range.
'Acceptable longitudinal orasasrfer low pressure systems: Aemr([moved);#nap lock;Bonding and spiral.
TABLE 10—B-1
DUCT-SLEEVE CONNECTIONS
DRIVE SLIP PLAIN"S" SLIP HEMMED "S" SLIP
ice=
ALTERNATE BAR SLIP REINFORCED
BAR SLIP (STANDING"S"SLIP) BAR SLIP(CLEAT)
r, 'I
ryj
{� 1
{ t
ANGLE SLIP STANDING SEAM POCKET LOCK
INSIDE SLIP JOINT DOUBLE"S" SLIP
TABLE NO. 10-C—GAGES OF METAL DUCTS AND PLENUMS USED FOR
HEATING OR COOLING FOR A SINGLE DWELLING UNIT
Galvanized Steel
Equivalent
Galvanized
Nominal sheet Apyrosimate
Thickness Gaga Aluminum
J.Inches) me.. g L S Gags
Round Ducts
and Enclo.cd
Rectang+dar
Ducts
14"or less 0,016 30 26
Over 14" 0.019 28 24
Exposed Rec-
tangular Ducts 1
14"or less 0.019 28 24
Over 14' 0.022 26 a3
42
TABLE NO. 10-E—DUCT SUPPORTS
PART I—VERTICAL DUCTS
MAXIMUM MAXIMUM
SIDE OF OIAMETER
RECTANGULAR METAL STRAP OR OF ROUND
DUCT ANGLE BRACKET OOCTS STRAPS
24" 1"x 1� (Strap)1 10" \o. 18 Rage galvanized
steel 2" wide
36" 1 x t x 'a"1 20' No. 16 gage galvanized
Angle steel 2" wide'
48' 15b"x 1 Ln"x 1/8"1 40" 1.4'steel x 11.a"1
Angle
60" 1'n x1'2"x 'rs"' 60" lt;"steel x2"E
Angle
Over 60" 2"x 2"lx
Ang e Over 60' i::"steel x 2'''
PART II—HORIZONTAL DUCTS
Same gage as gahan-
18" 1"x 18 Gage'- ized steel duct, 1" wide
10" or No. 18 gage galvan-
30" 1"x 18 Gage"- ized steel wire on 10'
centers
48" 1"x',4"2 20- Same gage as galvan-
ized steel duct, 1" wide
or No. 8 gage galvan-
60" x 54"= ized steel wire tied to
40" 1"galvanized steel hand
%"2 around duct on 10'cen-
ters
Same gage as g:dvan-
60" izeel steel duct, 11V
wide on 6' centers
Same gage as galvan-
Over60'ized steel duct, 112"
wide on 4'centers
PART III—HORIZONTAL DUCTS—TRAPEZE TYPE SUPPORTS
MAXIMUM
DIAMETER OF
ROUND DUCT
OR SIDE OF HORIZONTAL
RECTANGULAR SUPPORT
aUCT ANGLE' HANGER
36" 1'2"x 1'2"x's" la"round rod or C"x 1"x 1. Angle
48" " x 2" x Is la"round rod or 1"x 1"x Is anele
W. 2" x 2" x I. X`••"round rod or 1"x 1"x Is ancle
84" 2" x 2" x 1+. 3."round rtxl or 1"x 1"x Is-ang1v
'Sp-red vertically not more than 12 fert on c—ten,
tSpaced horizontally not more than 10 feet nn eent—
'Spoced not more than N feet en renterv.
43
SECTION 79
That Chapter 10, "Ducts, Insulation and Fire Dampers", of Exhibit B
of Ordinance No. 6408 be, and the same is hereby repealed.
SECTION 80
That a Chapter 10, "Ducts", be, and the same is hereby added to
Exhibit A of Ordinance.No. 6408, and such Chapter 10, after being so
added, shall read as follows:
"CHAPTER 10
"DUCTS
"NOTE: Tables in this Chapter appear at the end of the Chapter.
"SCOPE.
"Sec. 1001. Every duct and plenum, which is a portion
of any heating, cooling, absorption, or evaporative cooling
system, shall comply with the requirements of this Chapter.
"MATERIAL.
"Sec. 1002 (a) General. Circulating air and condi-
tioned air supply for heating, cooling, absorption or
evaporative cooling systems shall be conducted through a
duct system constructed of metal as set forth in Tables
10-A, 10-B, 10-C, or nonmetallic ducts complying with
U.M.C. Standard No. 10-1. Ducts, plenums and fittings
may be constructed of asbestos cement, concrete, clay or
ceramics when installed in the ground or in a concrete
slab provided all joints are tightly sealed.
"Concealed spaces within a building may be used as
circulating air plenums when such spaces are of noncombus-
tible material provided vents, vent connectors and exposed
combustible materials shall not extend into or through
such spaces. Combustible construction may be used for
the circulating air ducts, plenums or concealed spaces
which serve a dwelling unit.
"When approved by the Building Official, ducts and
plenums may be of independent construction or a part of
the building structure. Construction consisting of mater-
ials approved for one-hour fire-resistive construction
applied to the conditioned air side of either combustible
or noncombustible supports may be used as duct and plenum
walls.
"Where gypsum products are used on the conditioned
air side of ducts or plenums, the air in such plenums
shall have a temperature of not more than 125°F., nor
less than 50°F., nor shall it be of humid condition so
as to adversely affect the material.
"(b) Nonmetallic. Nonmetallic duct systems shall be
approved for the use intended or shall conform to the
requirements of U.M.C. Standard No. 10-1. Each portion
of a nonmetallic duct system shall be identified by a
label or other suitable identification.
32
SECTION 82
That Section 1104 of Exhibit 8 of Ordinance No. 6408 is hereby repealed.
SECTION 83
That a Section 1104 is hereby added to Exhibit A of Ordinance No. 6408
and after being so added same shall read as follows:
"ELEVATED DUCT GAS TEMPERATURES
"Section 1104. Where duct gas temperatures exceed
2500 F., special protective measures may be required by the
Building Official."
SECTION 84
That Subsection (g) of Section 1107 of Exhibit A of Ordinance No. 6408
be, and the same is hereby amended to read as follows:
"(g) Duct Enclosure. Ducts penetrating a ceiling, wall
or flooror shall be enclosed from the point of penetration
to the outside air as required for vertical openings in
the Building Code. The shaft or enclosure shall be separ-
ated from the duct by a minimum of 3 inches and a maximum
of 12 inches and this area shall be ventilated to the out-
side air. Such enclosure shall be sealed at the point of
penetration. The shaft or enclosure shall be used exclu-
sively to enclose a single grease exhaust duct system."
SECTION 85
That Subsection (i) of Section 1107 of Exhibit A of Ordinance No, 6408
be, and the same is hereby amended to read as follows:
"(i) Dampers. Dampers shall not be installed in any portion
of the duct system, unless the system is equipped with an
approved fire extinguishing system."
-44-
"(b) All cooking equipment shall have automatic
fuel shutdown in accordance with the following:
"l. An automatic gas shutoff valve must be
installed to shutoff all gas in the event
of system activation. It shall require
manual reset to restore the gas supply
to equipment.
"2. An individual automatic electric shut-
off shall be installed on fat fryers and
must interrupt the electrical supply to
the fat fryer upon system activation.
"3. The certified fire-protection installer
shall furnish automatic electric micro-
switch shutoff, or approved equivalent,
and shall insure that electrical wiring
is installed in a completely operable
condition and is ready for testing as
required under this section.
"(c) The system extinguisher pressure gauge shall
be placed not over six (6) feet above the floor and shall
be visible at all times.
"(d) Each automatic fire-extinguisher system shall
have a remote manual release cable pull, with a lead seal
and seal wire which is broken whenever the pull is used.
Pull shall be installed at not over five (5) feet above
the floor and either adjacent to or in the pathway of an
exit. Tripping action of pull shall be by mechanical
means. Pull shall be clearly defined by means of a wall
sign located directly above it.
"(e) Grease hood exhaust ducts shall have detectors
mounted in the center of duct area, with a minimum dis-
tance of six (6) inches and a maximum of twenty (20) feet
into the duct opening. Piping shall not pierce the grease
hood exhaust duct. All conduit and piping piercing the
grease hood shall be visible from the cooking side of the
filters.
"EXCEPTION: When approved by the Building
Official, that portion of the fire-extin-
guishing system required for the protection
of the duct may be omitted when all grease
producing cooking equipment is served by
U.L. labeled grease extractors. (This does
not include grease extraction filters).
"(f) Each fat fryer shall be protected by the instal-
lation of an additional individual fusible link located
under the filters in the hood over the fat fryer.
-46-
SECTION 86
That Subparagraph (8) of Subsection (b) of Section 1109 of Exhibit A
of Ordinance No. 6408 be, and the same is hereby amended to read as follows:
"8. Grease hoods or portions thereof, pene-
trating a ceiling, wall or furred space,
shall comply with all of the requirements
of Section 1107 (g).
"The height of the lowest edge of a grease
filter located above the cooking surface or
the heating surface shall be not less than
that set forth in Table No. 11-A."
SECTION 87
That Subsection C of Section 1111 of Exhibit B of Ordinance No. 6408
is hereby repeated.
SECTION 88
That Section 1111 of Exhibit B of Ordinance 6408 be, and the same is
hereby amended to read as follows:
"AUTOMATIC FIRE EXTINGUISHING SYSTEMS.
"(a) U.L. Approved, pre-engineered, automatic fire-estinguishing
systems shall be provided for the protection of grease flammable vapor pro-
ducing cooking equipment such as fat fryers, ranges, griddles, all types of
broilers, and such others as may exist.
"l. A permit shall be obtained from the Building Inspection
Division before the installation of a fire extinguishing
system is started.
2. Only licensed and permitted installers employed by certi-
fied firms shall install U.L. approved automatic fire
extinguishing systems.
3. Plans of the fire extinguisher system, indicating the
U.L. approved system model identification, and all
other details including nozzle and link locations,
shall be submitted by a State certified firm to the
Building Inspection Division before a permit will be
issued.
-45-
"I All individual detector links used in a
hood to protect surface cooking units shall
be located on the cooking side of the grease
filters.
"2. Fat fryer maximum hazard area per nozzle
shall not exceed five (5) square feet of
liquid fat surface, unless approved for a
greater amount.
"3. Ranges, griddles, fryers, broilers and char-
broilers shall each be protected by an indi-
vidual nozzle(s) in accordance with the fire
extinguisher manufacturers' listing and in-
structions for system installation and be
approved by the Building Official .
"(g) Listed fire-extinguishing systems shall be in-
stalled in accordance with the terms of their listing and
manufacturers' instructions. Fire-extinguishing equipment
piping shall be installed in compliance with the listing.
"(h) .4 supplemental portable fire extinguisher shall
be furnished whenever a grease hood and vent duct automatic
extinguishing system is installed. Extinguisher shall not
be less than (10) B.C. When dry powder is the extinguishing
agent, minimum weight of powder shall be five (5) pounds per
extinguisher.
"(i) All fixed pipe extinguishing systems, except water
sprinkler systems, in a single-hazard area shall be arranged
for simultaneous automatic operation upon actuation of any
one of the systems.
"Note: For the purposes of this requirement,
a single-hazard area is defined as one which
includes all cooking equipment, hoods, and a duct
work connection by less than 125 running feet of
duct from the closest hood served.
"l . Upon completion of the installation of an
automatic fire extinguishing system or an
addition thereto, the certified firm shall,
before the system is placed in use, perform
an operating test in conformance with the
requirements of the Building Official .
SECTION 89
That a Section 1113 is hereby added to Exhibit B, of Ordinance No. 6408
and after being so added shall read as follows:
Sec. III (a) Interior toilets except dwellings shall have
an exhaust system having not less than one air change every five
(5) minutes. Provision shall be made for make-up air.
(b) When exhaust fans are installed, the air dis-
charge duct shall be not less than three inches (3") in diameter
and shall conform to all requirements of Chapter 10. All duct
joints shall be held together with metal screws. Combustible
material shall not be attached to the duct system. Ducts shall
be of aluminum or galvanized steel . The amount of elbows shall
not exceed three or the equivalency.
-47-
SECTION 90
That the term "comfort," as used throughout the Exhibits A and B of
Ordinance No. 6408 and, more particularly, throughout Chapter 12 of Ex-
hibits A and B of Ordinance No. 6408, be and the same is hereby deleted.
SECTION 81
That Chapter heading and Section 1201 of Chapter 12 of Exhibit A
of Ordinance No. 6408 be, and the same are hereby amended to read as
follows:
"CHAPTER 12
"COOLING
"GENERAL.
"Sec. 1201. Every cooling system and cooling unit shall
conform to the requirements of this Chapter and to the appli-
cable requirements of Part IV."
SECTION 92
That Section 1202 of Chapter 12 of Exhibit A of Ordinance No. 6408
be, and the same is hereby amended to read as follows:
"INSTALLATION.
Sec. 1202. Cooling coils installed as a portion of,
or in connection with, any warm-air furnace shall be ar-
ranged to comply with the requirements of Section 705.
"Direct refrigerating systems containing Group 2
refrigerants shall not serve any cooling or air condi-
tioning system used for human comfort.
"When any cooling equipment, other than ducts and pip-
ing, is suspended from the underfloor construction, a mini-
mum clearance of not less than three (3) inches shall be
provided between the base of the equipment and the ground.
"Except for piping, ducts and similar equipment that
does not require servicing or adjusting, an unobstructed
access and passageway not less than two feet in width by
six feet six inches in height (2' x 6'6") shall be pro-
vided to every cooling unit.
"EXCEPTION: The access opening to a cooling
unit located in an attic space may be reduced
to thirty (30) inches in length and width,
provided the unit can be replaced from this
opening, or any other opening into this space
or area.
"An unobstructed working space not less than thirty (30)
inches in depth and six feet six inches (6'6") in height,
shall be provided along the entire firebox and control side
of every cooling unit.
"An unobstructed access space not less than twenty-four
(24) inches in width and thirty (30) inches in height shall
be provided to every air filter, fuel control valve, and air
handling unit.
-48-
"EXCEPTION: An access opening from this
unobstructed access space, which opens dir-
ectly to such equipment, may be reduced to
fifteen (15) inches in the least dimension
if the equipment can be serviced, repaired
and replaced from this opening without re-
moving any permanent construction.
"An unobstructed access space not less than twenty--four
(24) inches in width and eighteen (18) inches in height shall
be provided to every cooling unit vent collar, unless the vent
collar is accessible from an access panel approved with the
unit.
"Access to equipment located in a machinery room shall
comply with Section 1507.
In addition to the applicable provisions of this Section,
access to equipment located on a roof or on an exterior wall of
a building shall be provided as required for furnaces in Sec-
tion 710 of this Code.
"Where a fixed ladder is serving equipment located in an
attic space, it shall lead directly to the required access open-
ing and a suitable handhold shall be provided in the attic dir-
ectly above the access ladder.
"Where ready access is required to equipment located in an
attic or furred space and the access is by means of a scuttle,
the scuttle opening may be reduced to thirty (30) inches in
length and width provided the equipment can be replaced from
this opening.
"Every passageway serving equipment located in an attic or
furred space shall have solid continuous flooring not less than
two (2) feet in width from the access opening to the required
working space and platform in front of the equipment.
"Uhere access is required to equipment located in an under-
floor space, attic, or furred space, there shall be installed a
permanent electric outlet and lighting fixture at, or near, the
equipment. This light shall be controlled by a switch at the
required passageway opening.
"EXCEPTION: This requirement shall not
apply where the fixed lighting for the
building will provide sufficient light for
safe servicing of the equipment.
"Where the cooling coil or air conditioning unit is lo-
cated above a living space, or where structural damage may
result from condensate overflow, an additional watertight pan
of corrosion--resistant metal shall be installed beneath the
cooling coil or unit to catch overflow condensate due to a
clogged condensate drain, or one pan with standing overflow
and separate drain may be provided in lieu of the second drain
pan. The additional pan, or the standing overflow, shall be
provided with a drain pipe, minimum three-fourths (3/4) inch
nominal pipe size, discharging at a point which can be readily
observed."
SECTION 93
That Section 1203 of Chapter 12 of Exhibit A of Ordinance No. 6408
be, and the same is hereby amended to read as follows:
49
"WORKING SPACE.
"Sec. 1203. All equipment requiring access thereto, as
specified in Section 1202, shall be provided with an unob-
structed space on the servicing side of the equipment of not
less than thirty inches in depth and six feet six inches in
height (30" x 6'6"). (Note: Also see the Electrical Code
for working space requirements about electrical equipment).
"EXCEPTION: The height of the working space
may be reduced to thirty (30) inches for an
air handling unit, air filter, or refrigerant
and brine piping control valves.
"Working space for equipment located in a machinery room
shall comply with Section 1507."
SECTION 94
That Section 1204 of Chapter 12 of Exhibit A of Ordinance No. 6408
be, and the same is hereby amended to read as follows:
"CIRCULATING AIR.
"Sec. 1204 (a) Source. Circulating air shall be taken
from outside the building, or from the conditioned area in-
side the building, or from both sources. Every cooling sys-
tem regulated by this Code, and designed to replace required
ventilation, shall be arranged to discharge into the condi-
tioned space not less than the amount of outside air speci-
fied in the Building Code.
"(b) Duct Systems. Circulating air for any blower-type
cooling system shall be conducted through ducts complying
with Chapter 10.
"Corridors shall not be designed or used as an integral
part of a duct system when the corridor is required to be of
fire-resistive construction by Section 3304 of the Building
Code.
"(c) Separation. Except as provided in this Section,
there shall be a positive separation between any combustion
air and the circulating air for a blower-type cooling system.
"Every combustion chamber opening shall be separated
from any fan plenum by an airtight separation without open-
ings therein, except through an air lock not less sixteen
(16) square feet in area, equipped with tight-fitting doors
arranged to close automatically.
"EXCEPTION: This shall not apply to a fan
plenum access opening which does not exceed
twenty-four (24) inches by thirty (30) inches
(720 square inches) if the opening is equip-
ped with a tight-fitting panel or door.
"(d) Prohibited Sources. The circulating air for any
cooling system or cooling unit shall not be taken from any
of the following locations:
"l. Closer than 10 feet from any appliance vent out-
let, unless such vent outlet is three (3) feet
above the circulating air inlet.
"2. Where it will pick up objectionable odors, fumes,
or flammable vapors.
50
"3. A hazardous or insanitary location or a machin-
ery room.
"4. From an area the volume of which is less than
twenty-five (25) percent of the entire volume
served by such system, unless there is a perma-
nent' opening to an area the volume of which is
equal to twenty-five (25) percent of the entire
volume served.
"5. From a room or space having any direct-fired,
fuel-burning appliances therein.
"EXCEPTION: This shall not apply to a cool-
ing system or a cooling unit complying with
all the following requirements:
"Where the circulating air is taken from a
room or space, having a volume exceeding
one (1) cubic foot for each 10 B.T.U.H.
fuel input rate of all fuel-burning appli-
ances therein:, and
"At least seventy-five (75) percent of the
conditioned air is discharged back into
the same room or space; and
"Circulating air inlets shall not be lo-
cated within ten (10) feet of any appli--
ance firebox or draft diverter in the same
enclosed room or space.
"6. Closer than ten (10) feet from any vent open-
ing for a plumbing drainage system, unless the
vent opening is at least three (3) feet above
the circulating air inlet.
"7. A closet.
"(e) Return Air Limitation. Return air from one dwell-
ing unit shall not be discharged into another dwelling unit
through the cooling system.
"(f) Air Velocity. Every cooling system coupled with a
direct-fired furnace shall be so designed and constructed that
air velocity (in feet per minute) through filters shall not
exceed the filter manufacturer's recommendation. Filters shall
be installed in other than portable cooling units.
"(g) Screen. Every required circulating air inlet from
outside the building shall be covered with screen having one-
fourth (1/4) inch openings.
"EXCEPTION: Any such circulating air in-
let serving any nonresidential portion of
any building may be covered with screens
having openings not exceeding one (1) inch
in width."
SECTION 95
That Section 1207 of Chapter 12 of Exhibit B of Ordinance No. 6408
be, and the same is hereby amended to read as follows:
51
"Sec. 1207 (a) Chilled and Low Temperature (210°F.) Hot Water
Piping Material. Copper pipe or tubing, for c it e - otwater piping,
shall have a weight of not less than that of copper, Type L.
"EXCEPTION: Type M copper pipe or tubing
may be used when piping is not run under
a concrete slab or is aboveground and the
maximum pressure does not exceed 60 p.s.i .
and'the working temperature does not ex-
ceed 210°F.
"Underground copper pipe joints shall be made
with high temperature solder equal to silfos.
"(b) Steel piping shall be seamless or electric butt-
welded black or hot-dipped galvanized. The minimum strength
shall be "Standard Weight," Schedule 40 or 80 as necessary to
meet pressure requirements.
"1. For one and one-half (1-1/2 inch or smaller, use
not less than Schedule 80 if pipe is to be threaded.
For working pressures in excess of 300 p.s.i., use
Schedule 80.
"2. All underground pipe, also pipe sizes two and one-half
(2-1/2 inch) I.P.S. and larger, shall have welded
joints. Piping change of direction shall be made with
seamless welding fittings or of Weldolet type. Mitered
fittings are not permitted.
"(c) Asbestos cement pipe may be installed underground for this
use, only when it is insulated and joints sealed in a manner approved
by the Building Official.
"(d) Building structures served by underground distribution
system shall have all chilled-hot water connections to each structure
valved in such a manner as to afford isolation of the structure from
the system. Gate valves shall be installed approximately two (2)
feet outside of the structure unless otherwise approved by the Building
Official . Valves shall be accessible through a concrete or cast iron
box, with top mounted flush with final grade."
SECTION 96
That the Chapter heading and Sections 1301, 1302, 1303 and 1304 of
Chapter 13 of Exhibit A of Ordinance No. 6408, be and the same are hereby
amended to read as follows:
"CHAPTER 13
"EVAPORATIVE COOLING SYSTEM
"Sec. 1301 General, Every evaporative cooling system installed
on a building used for commercial or industrial purposes shall com-
ply with this chapter.
"All air ducts and fire dampers which are a portion of an eva-
porative cooling system shall comply with this Code.
"Sec. 1302 (a) Location. Every evaporative cooling system
shall be installed so as to minimize the probability of damage
from an external source.
-52-
CHAPTER 14
ABSORPTION REFRIGERATING EQUIPMENT
"Sec. 1401 . GENERAL. In addition to other provisions of
this Code, absorption equipment shall comply with the requirements
of this Chapter.
"Sec. 1402 APPROVAL OF EQUIPMENT. Each absorption system shall
be approved by the Building U ficial for safe use, based upon
applicable nationally recognized standards as determined by a testing
agency approved by the Building Official.
"Sec. 1403 LABELS AND INSTRUCTIONS. Every fuel-burning absorption
system shall bear a label containing the following information:
"1. Manufacturer's name.
"2. Model number.
"3. Amount and type of refrigerant.
"4. Factory test pressures or pressures applied.
"5. Normal hourly B.T.U.H. input rating.
"6. Minimum hourly B.T.U.H. input rating for units having
step or automatic modulating controls.
"7. Cooling capacity in B.T.U.H. 's per hour.
"8. Type of fuel .
"9. Symbol of the organization certifying the approval
of the equipment.
"10. Instructions for the lighting, operation and shutdown of
the system.
"(a) Every absorption system shall be installed to conform
to the conditions of its listing and to the requirements of this
Code. The installer shall leave the manufacturer's installation
and operating instructions attached to the unit.
"Sec. 1404 LOCATION. Fuel-burning absorption systems shall
not be installed in tFie following locations:
"l. In any room or space, less than twelve inches wider
than the units installed therein, with a minimum
clear working space of not less than three (3) inches
along the sides, back and top of the unit.
"EXCEPTION: A replacement absorption system occupying
the same or lesser floor area may be installed in the
same location as the existing absorption system, pro-
vided the replacement does not violate other provisions
of this Code.
"2. In any hazardous location.
"3. In any surgical operating room or medical treatment room.
"4. Under any stairway.
"5. In a Group A, B, C, D, F or G Occupancy, unless
separated from the rest of the building by not less
than a One-hour Fire-resistive Occupancy Separation.
"EXCEPTIONS:
"l. Boilers or central heating plants where the largest
piece of fuel equipment does not exceed 400,000 B.T.U.H.
per hour input.
-54
"2. Buildings not more than one story in height of Group F,
Division 2 Occupancies with an occupant load of less
than 30.
"3. Equipment installed on the roof of a building.
"6. In any Group E Occupancy unless separated from such occupancy
by not less than a Two-hour Fire-resistive Occupancy Separa-
tion. In Group E, Divisions 1 and 2 Occupancies, there
shall be no openings in such separations except for
necessary ducts and piping,
"7. In Group H Occupancies, unless separated from such-
occupancy by not less than One-hour Fire-resistive Occupancy
Separation.
"EXCEPTION: A separation shall not be required for
such equipment serving only one dwelling unit.
"8. In any room used, or designed to be used, as a bedroom,
bathroom, closet or in any confined space with access
only through such room or space.
"(a) Absorption systems containing any Group 2 refrigerant
shall not be located in any buildings unless installed within
a machinery room as provided in Chapter 15.
"(b) Absorption systems containing more than twenty (20)
pounds of a Group 2 refrigerant shall be located not less than
twenty (20) feet from any door, window, or ventilating air inlet
to any building.
"EXCEPTION: This distance may be reduced provided
the required pressure relief device is arranged to
discharge the refrigerant in compliance with Section 1517.
"(c) Absorption systems and portions thereof shall not be
located in any elevator shaft, dumbwaiter shaft, or any Shaft
having moving objects therein, nor'in any location where it will
be subject to mechanical damage.
"Sec. 1405 INSTALLATION. Fuel-burning absorption systems
shall be installe t-o c-onform with the conditions of approval.
"Fuel-burning absorption systems located outside of a
building shall be completely enclosed in a weatherproof housing,
unless approved for outdoor installation. The housing, when
constructed of metal, shall be of galvanized steel or aluminum
not less than No. 24 Manufacturer's Standard Guage, Supported
on a substantial metal frame. The housing shall not be lar er
than necessary to properly cover and provide a minimum six �6)
inch clearance around the unit or units enclosed therein, in-
cluding all controls and draft diverters.
"(a) Every absorption system supported from the ground
shall rest on a concrete slab extending not less than three (3)
inches above the adjoining ground level.
"(b) Every absorption system shall be equipped with a
factory installed pressure relief device, either a fusible plug,
a rupture member, or a pressure relief valve.
"(c) A suitable and substantial metal guard shall be provided
around all flywheels, fans, pulleys and belts which are a portion
of any absorption system.
-55,
"(b) Location of evaporative cooling system shall comply
with the zoning ordinance.
"Sec. 1303 Access, Inspection and Repair. Every evaporative
cooler shall be accessible for inspection, service and replacement
without removing permanent construction.
"Sec. 1304 (a) Installation. Every evaporative cooler
supported by the building structure shall be installed on a sub-
stantial level base and shall be secured directly or indirectly
to the building structure by suitable means to prevent dis-
placement of the cooler.
"(b) Every evaporative cooler supported directly by the
ground shall be isolated from the ground by a level concrete
slab extending not less than three (3) inches above the adjoining
ground level.
"(c) Every evaporative cooler shall be installed on a level
base at least six (6) inches above the adjoining ground level
and shall be supported in an approved manner. Any modifications
made to the supporting framework or buildings as a result of the
installation shall be in accordance with the requirements of the
Building Code. Holes for penetrations of ducts, or for plenums
shall be at least two (2) inches larger than the duct or plenum
which passes through. Openings in exterior walls shall be flashed
in an approved manner in accordance with the requirements of the Building Code.
"(d) The minimum unobstructed total area of the conditioned
air ducts from an evaporative cooler shall be not less than the
area of the discharge opening of the cooler.
"Note: For the purpose of the preceding paragraph, a
volume damper, grille, or register, installed for the
purpose of controlling the conditioned air flow, shall
not be considered an obstruction."
SECTION 97
That Sections (j), (k), and (1) of Section 1306 of Chapter 13 of
Exhibit B of Ordinance No. 6408 be, and the same are hereby repealed.
SECTION 98
That Section 1401 and the EXCEPTION thereto of Chapter 14 of Exhibit B
of Ordinance No. 6408 be, and the same are hereby repealed.
SECTION 99
That Sections 1402, 1403, and 1404 of Chapter 14 of Exhibit A of Ordinance
No. 6408 be, and the same are hereby repealed.
SECTION 100
That Part IV, REFRIGERATION, of Exhibit A of Ordinance No. 6408 be, and
the same is hereby amended to begin with a new Chapter 14, such Chapter being
hereby added and after being added such Chapter 14 shall read as follows:
-53-
"(d) All refrigerant piping.and fittings, brine piping and
fittings, which during normal operation could reach a surface
temperature below the dew point of the surrounding air and are
located in spaces or areas where condensation could cause a safety
hazard to the building occupants, structure, electrical equipment
or other equipment, shall be protected to prevent such damage.
SECTION 101
That Chapter 15, Refrigerating Equipment, of Part IV, Refrigeration,
of Exhibit A of Ordinance No. 6408 be, and the same are hereby repealed.
SECTION 102
That Chapter 15, Refrigerating Equipment, of Part IV, Refrigeration,
of Exhibit B, of Ordinance No. 6408 be, and the same is hereby repealed.
SECTION 103
That Part IV, Refrigeration, of Exhibit A of Ordinance No. 6408 be, and
the same is hereby amended by the addition of a new Chapter 15 and such
Chapter, after being so added, shall read as follows:
CHAPTER 15
"MECHANICAL REFRIGERATING EQUIPMENT"
"SCOPE
"Sec: 1501. All mechanical refrigerating systems and equipment
shall conform to the requirements of this Code.
"A label of an approved agency, which is attached to the
equipment, will be accepted as evidence that the equipment is
approved.
"Refrigerating systems and equipment, including the replacement
of parts and alterations, shall comply with the provisions of this
Chapter.
"REFRIGERANTS
"Sec. 1502. The refrigerant used shall be of a type listed in
Section 1503 unless the Building Official finds that a proposed
refrigerant is no more hazardous to life, limb, health, or property
than the type listed.
"CLASSIFICATION OF REFRIGERANTS
"Sec. 1503. (a) Group 1. The following refrigerants shall be
classified as Group I refrigerants:
UICAucAt "FRM aANJ
NAMC Of aCENICCAANt fONaWA NUaUCA
Curhun Noxidc CO. 744 I
Dichlorodifluoromethano COX, 12
Dichorodifluoromethano,73.8 par M.F. 600
cent,and ]thylideno Fluoride
2G.2 per cent Cil,-Clive
Dichloromethano (itiethyleno
chloride)w cilecl, 30
Dichlorommiofluoromethano cilcilF 21
Dichlorotetrnfluoroethanc C,CI,b'. 114
X0:iohromotrifiuoromcthano C1160. 4%
Fionochlorodirluoromethana clicil", ff
dionochlorodifiuoromcthano, Clicly, 602
44.3 l"v mot
and Atonochhnvµ,m,la-
fluon+Allane.AL.2 per cant ccircF,
:lionochlarotrifluoromothana CCii'. 13
Octatiuorocycla6uta1%a C.10. C218
Trichloromononuoromothans COX 11
Trichlorotrinuoroothotw C,C.04 113
'lrichlaroetkyloao C.1I04
Water -— — - . ._ . 8.o
-66-
SECTION 104
That Section 1803 of Exhibit B of Ordinance No. 6408 be, and the same
is hereby amended to read as follows:
"Sec. 1803 (a) Incinerators.. In which the maximum hourly des-
truction rate of Type I waste or its equivalent does not exceed 350
pounds per hour, shall have refuse storage rooms separated from other
parts of the building by walls, floors and ceiling assemblies, having
a fire resistance of not less than one (1) hour. Storage room shall
be used only for the storage of the waste to be destroyed or the
storage of waste materials containers.
"(b). In private dwellings occupied by not more than two families,
any residential-type incinerator having a Type I waste destruction capa-
city of 100 pounds or less need not be in a separate room, provided in-
stallation complies with minimum clearances prescribed for residential-
type incinerators."
SECTION 105
That Section 1804 of Exhibit B of Ordinance No. 6408 be, and the
same is hereby amended to read as follows:
"Sec. 1804. Incinerators in which the maximum hourly destruction
rate of Type I waste or its equivalent exceeds 350 pounds per hour shall
have refuse storage rooms separated from other parts of the building by
walls, floor and ceiling assemblies constructed of noncombustible material
have a fire-resistive rating of not less than two (2) hours.
1. Door shall be fire-resistive, Class A, and shall have a
U.L. approved door closer with fusible link.
"2. Storage room shall be used only for the storage of the
waste to be destroyed or the storage of waste materials
containers."
SECTION 106
That Subsection (a) of Section 1806 of Exhibit B of Ordinance No. 6408
be, and the same is hereby amended to read as follows:
"Sec. 1806 (a). An automatic sprinkler and a short length
of hand hose shall each be connected to a suitable water supply
in every incinerator storage room."
SECTION 107
That Section 1808 of Exhibit B of Ordinance No. 6408 be, and the same
is hereby amended to read as follows:
"Sec. 1808. Metal chimneys for incinerators shall conform to
to the requirements of Section 914."
SECTION 108
That the EXCEPTION to Subsection (b) of Section 1809 of Exhibit B of
Ordinance No. 6408 be, and the same is hereby amended to read as follows:
"EXCEPTIONS: 1. Single chamber incinerators may be used in
Class I occupancies only.
"2. Single chamber tncinerators are acceptable in any
occupancy when using the principle of waste gasification
- 70 -
and then destruction by burning. When installed in capacities
of over 500 pounds per hour, they shall be equipped with an
automatic charging device which will not disturb the air
mixture of the combustion chamber during a charging of waste."
SECTION 109
That Subsection (c) of Section 1901 of Exhibit A of Ordinance No. 6408 be,
and the same is hereby repealed.
SECTION 110
That Chapter 19 of Exhibit B of Ordinance No. 6408 be, and the same is
hereby amended by the addition of the following EXCEPTION to Subsection (b)
of SECTION 1902 of such Chapter 19 and such EXCEPTION after being so added
shall read as follows:
Section 1902
(b) * * *
"EXCEPTION: When approved by the Building Official ,
a range exhaust hood, installed over a domestic range
and equipped with a fan to draw air through an activated
charcoal filter, which air is then discharged into the
cooking area, is permitted."
SECTION Ill
That Subsection (c) of Section 1901 of Exhibit A or Ordinance No. 6408 be,
and the same is hereby repealed.
SECTION 112
That Subsection (c) of Section 1903 of Exhibit B of Ordinance No. 6408 be,
and the same is hereby amended to read as follows:
"Domestic clothes dryers shall be exhausted to the outside."
SECTION 113
That Section 1903 of Exhibit A of Ordinance No. 6408 be and the same
is hereby amended to read as follows:
DOMESTIC CLOTHES DRYERS
"Sec. 1903 (a). Where a clothes dryer is connected to a
moisture exhaust duct, it shall be installed in accordance with
manufacturer's instructions and recommendations.
"(b). A clothes dryer moisture exhaust duct shall not be
connected into any vent connector, gas vent, or chimney.
"(c). Ducts for exhausting clothes dryers shall not be put together
with sheet metal screws or other fastening means which extend into
the duct.
"(d). Moisture exhaust ducts shall not terminate beneath the
building or in the attic area.
Domestic clothes dryers shall be exhausted to the outside if in an
area that is habitable or containing other fuel-burning appliances.
- 71 -
COMMERCIAL CLOTHES DRYERS
(g) All commercial clothes dryers shall exhaust to the
outside.
1. Exhaust may be through the wall , terminating in
an approved lint catcher, or through the roof, termi-
nating in a rainproof outlet.
2. Lint discharge or collection on a roof, yard, street,
alley or any public or private property or premises is
prohibited.
3. Combustion air for fuel-fired dryers shall conform
to the requirements of Table 6. Combustion air shall
be taken from outside.
4. Circulating air for the dryers shall also be taken
from the outside. A minimum area of one (1) square inch
shall be provided for each ten (10) cubic feet per
minute of dryer air.
5. Ducts for inlet or discharge air shall conform to
Chapter 6.
6. A minimum clear passage of two feet (2') shall be
available at the rear of the units for servicing the
dryer.
SECTION 114.
That Appendix C of Exhibit A of Ordinance No. 6408 be, and the
same is hereby amended to read as follows;
72 -
SECTION 115
That Table No. 10-1-A of Uniform Mechanical Code Standard No. 10-1
of Exhibit A of Ordinance No. 6408 be, and the same is hereby repealed.
SECTION 116
That the first paragraph of Subsection (d) of Section 10.115 of
Uniform Mechanical Code Standard No. 10-1 of Exhibit A of Ordinance No.
6408 be, and the same is hereby amended to read as follows:
"(d) Test Apparatus. The impact is to be that of a can-
vas bag containing sand and weighing twenty (20) pounds. The
bag is to be formed of eight-ounce duck, drawn tightly around
the sand and tied with a cord. The bag is to be raised above
the top of the duct and allowed to free fall ten (10) inches
so as to strike the top of the duct on its longitudinal axis."
SECTION 117
That the second paragraph of Subsection (b) of Section 10.116 of
Uniform Mechanical Code Standard No. 10-1 of Exhibit A of Ordinance No.
6408 be, and the same is hereby amended to read as follows:
"The inlet of the air fan used for the test is to be cov-
ered with a double layer of cheesecloth (14 to 15 square yards
per pound and known to the trade as 'count of 32 by 28'). A
damper, if employed for regulating velocity in the duct system,
is to be located between the screen and the fan or between the
fan and the inlet to the test sample. A collecting screen con-
sisting of a double layer of cheesecloth, as specified in this
paragraph, stretched taut on a frame sized to provide for an
area not less than five times the inside across-sectional area
of the test sample, is to be located one (1) foot from the
outlet end of the test sample."
SECTION 118
That Subsection (a) of Section 10.117 of Uniform Mechanical Code
Standard No. 10-1 of Exhibit A of Ordinance No. 6408 be, and the same
is hereby amended to read as follows:
"(a) General. Duct sections with joints, assembled in
accordance with the manufacturer's instructions, and connec-
tors shall withstand, without rupture, an internal air pres-
sure of two and one-half times the manufacturer's rated
positive pressure, but not less than one and one-fourth inch
water column."
-79-
SECTION 119
That Subsection (a) of Section 10.119 of Uniform Mechanical Code
Standard No. 10-1 of Exhibit A of Ordinance No. 6408 be, and the same
is hereby amended•to read as follows:
"(a) Sample. Samples previously untested are to be used
for the test. Samples, eight (8) feet long, are to be se-
lected and prepared in accordance with Section 10.114 (b) and
(c). Suitable steel collars, if not part of the assembly,
are to be attached to each end of the test sample in accord-
ance with the manufacturer's instructions. One end collar
is then to be secured to an overhead support so as to allow
the sample to be suspended vertically. A twenty-five (25)
pound weight is to be attached to the lower end collar and
allowed to remain for twenty-four (24) hours."
SECTION 120
That Uniform Mechanical Code Standard No. 15-1 of Exhibit A of
Ordinance No. 6408 be, and the same is hereby repealed.
SECTION 121
That this ordinance shall be cumulative of all other ordinances
affecting the regulation of heating, cooling, refrigeration, ventila-
tion and exhaust systems and other miscellaneous heat-producing appli-
ances and shall not repeal any of the provisions of such ordinances,
except in those instances where provisions of those ordinances are in
direct conflict with the provisions of this ordinance.
SECTION 122
That all rights or remedies of the City of Fort Worth, Texas, are
expressly saved as to any and all violations of Ordinance No. 6408, or
of any amendments thereto, of said City of Fort Worth, Texas, which have
accrued at the time of the effective date of this ordinance; and as to
such accrued violations, the Court shall have all of the powers that
existed prior to the effective date of this ordinance.
SECTION 123
That it is hereby declared to be the intention of the City Council
that the sections, paragraphs, sentences, clauses and phrases of this
-80-
ordinance are severable, and if any phrase, clause, sentence, paragraph
or section of this ordinance shall be declared void, ineffective or un-
constitutional by the valid judgment or final decree of a court of com-
petent jurisdiction, such voidness, ineffectiveness or unconstitution-
ality shall not affect any of the remaining phrases, clauses, sentences,
paragraphs and sections of this ordinance, since the same would have
been enacted by the City Council without the incorporation herein of any
such void, ineffective or unconstitutional phrase, clause, sentence,
paragraph or section.
SECTION 124
That any person violating any of the provisions of this ordinance
shall be deemed guilty of a misdemeanor, and each such person shall be
deemed guilty of a separate offense for each day or portion thereof
during which any violation of any of the provisions of this ordinance
is committed, continued or permitted, and each violation shall be pun-
ishable by a fine not to exceed Two Hundred Dollars ($200.00).
SECTION 125
That this ordinance shall constitute a revision of the Mechanical
Code of the City of Fort Worth, Texas, as provided by Section 2, Chap-
ter XXVI and Section 10 Chapter XXVIII of the Charter of said City,
and the City Secretary is hereby directed to publish this ordinance in
book or pamphlet form for general distribution among the public so as
to revise such heretofore published Ordinance No. 6408, as amended, the
Mechanical Code of the City of Fort Worth; and this ordinance as so
published and such revised publication of such Ordinance No. 6408, as
amended, shall be admissible in evidence as provided in Section 3,
Chapter XXVI of such Charter.
-81-
SECTION 126
That the City Secretary of the City of Fort Worth is hereby directed
to engross and enroll this ordinance by copying the caption as well as
Sections 121 through 127 hereof in the minutes of the City Council of
Fort Worth, and by filing the ordinance in the ordinance records of said
city.
SECTION 127
The City Secretary shall cause to be published the caption as well
as Sections 121 through 127 hereof in the official newspaper for five
days. This ordinance shall be in full force and effect from and after
the date of its passage and such publication as required by law, and it
is so ordained.
APPROVED AS ,TO FORM AND LEGALITY:
S. G. JOHNDROE, JR., CITY ATTORNEY
ADOPTED: inda P r 21. 1324
EFFECTIVE:
-82-
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moil,
2'1",fl*i=va uu� " ^
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xx.
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xcnoc/% `
"GENERAL
"Sec. 1504. Supports for compressors and condensing units
shall b-, de,�gned -zo safely curry the load of the equipment
supported. supports from buildings or parts of buildings that
are of noncombustible construction shall be noncombustible.
"Every compressor or portion of u condensing unit supported
from the ground shall rest on a concrete slab extending not less
than J inches above the adjoining ground level.
"An unobstructed access opening and passageway, not less than
24 inches in the least dimension, ,hall be provided and maintained
to every compressor, unless otherwise specified by this Code'
"A suitable and substantial metal guard `hall be provided around
all flywheels, fans, pulleys, and belts which are a portion of any
refrigerating machinery.
"Refrigerating systems and portions thereof shall not be
located in any elevator shaft, dumbwaiter ,haft, or any shaft
having moving objects therein, nor in any location where it will
be subject to mechanical damage.
''Every room or space, other than a machinery room complying
with the requirei^cnts of this Chapter, in which any refrigerant-
containing portion of a condensing unit is located, shall be
provided with one of the following means of ventilation:
"l. Permanent gravity ventilation openings of not
less than 2 square feet total area, opening
directly to the outside of the building, or
extending to the outside of the building by
continuous ducts.
"2' A mechanical exhaust system of ventilation arranged
to provide u complete change of air in such room
or space at least every 20 minutes and to dis-
charge to the outer air.
"EXCEPTION: This paragraph shall not apply to
any portion of a condensing unit in a room or
space if the cubical content exceeds 1000
cubic feet per horsepower of the unit or where
such room or space has permanent gravity venti-
lation openings of 2 square feet minimum total
area to other rooms or spaces exceeding 1000
cubic feet per horsepower.
"Refrigerant compressors of more than one horsepower rating
shall be located not less than lO feet from any exit in any Group A, D, C,
o, r, Division 2, or H Occupancy unless separated by u One-hour Fire-
resistive Occupancy Separation.
"All refrigerant machinery pipings and fitting,, brine piping
and fittings which during normal operation could reach a surface
temperature below the dew point of the surrounding air and are
located in spaces or areas where condensation could muse a safety
huzunu to the building occupants, structure, electrical equipment,
or any other equipment, shall be protected in a manner to prevent
such damage.
"Compressors shall not be placed in any hazardous location.
-57-
"GROUP 1 REFRIGERANTS
"Sec. 1505. (a) GENERAL. Every condensing unit or combination
of refrigerant interconnected, condensing units totaling 100 or more
horsepower rating which contain any Group 1 refrigerant shall be
enclosed in a machinery room. A system containing more than the
quantity of a Group i refrigerant allowed in Section 1505 (b) shall
be of the indirect type.
"EXCEPTION: The requirements of this Section shall not
apply to:
"l. Any condensing unit located outside of a building or on
the roof of a building and not less than 20 feet from
any door, window, or ventilating air opening in any building.
"2. Any condensing unit located in a building used exclusively
for ice making or cold storage together with the usual accessory
rooms in connection therewith.
"3. A Group F, Division 2, or Group G Occupancy, if the
quantity of .refrigerant does not exceed 30 pounds for
each 1000 cubic feet of space in the room in which
the condensing unit is located.
"(b) DIRECT SYSTEMS. The maximum quantity of a Group 1
refrigerant in a direct system in all occupancies other than Group D
shall not exceed that set forth in Table No. 15-A.
"Direct Systems in Group D Occupancies shall be limited to
systems each containing not more than 50 percent of the permissible
quantities of Group 1 refrigerants set forth in Table No. 15-A.
When the refrigerant-containing parts of a system are located
in one or more enclosed spaces, the cubical content of the smallest
enclosed humanly occupied space other than the room in which the
refrigeration equipment is located, shall be used to determine
the permissible quantity of refrigerant in the system. Where a
refrigerating system has evaporator coils serving individual
stories of a building, the story having the smallest volume
shall be used to determine the maximum quantity of refrigerant
in the entire system.
"When the evaporator is located in an air duct system, the
cubical content of the smallest humanly occupied enclosed space
served by the air duct system shall be used to determine the
permissible quantity of refrigerant in the system.
"EXCEPTION: If the air flow to any enclosed space
served by a portion of an air duct system cannot be shut
off or reduced below one-quarter of its maximum, the
cubical contents of the entire space served by that
portion of the air duct system may be used to determine
the permissible quantity of refrigerant in the system.
-58-
.. ............... . ....
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"GROUP 2 REFRIGERANTS
"Sec. 1506. A mechanical refrigerating system or unit
refrigerating system containing a Group 2 refrigerant shall not be
located within a building unless all refrigerant-containing portions
of the systew arc enclosed in a machinery room. Such systems when
installed outside of a building shall be located at least 20 feet
from any exit, door, window, or ventilating air inlet in any building.
"EXCEPTION: This shall not apply to a building used
exclusively for ice making, cold storage, or for the
manufacturing or processing of food or drink, pro-
vided the occupant load does not exceed one person
per 100 square feet of floor area served by such system. ,
"Portions of refrigerating systems containing Group 2
refrigerants shall not be located in an exit.
"MACHINERY ROOMS
"Sec. 1507. Required machinery rooms shall be of at least one-hour fire-
resistive construction with all interior openings protected with fire assem-
blies having a one-hour fire protection rating. Doors shall be self closing.
"There shall be no direct opening between any machinery room containing
any Group 2 refrigerant and any room or space'in which there is an open flame,
spark-producing device, or heating surface in excess of 800' F. Every machinery
room containing any Group 2 refrigerant shall have at least two means of exit
located at least one-fifth the perimeter of the room apart. Exit openings shall
be not less than 3 feet by 6 feet 8 inches.
"Every machinery room containing any Group 1 refrigerant shall have
at least one means of exit. Such exit opening shall be not less than 3 feet
by 6 feet 8 inches.
"Every machinery room door shall open in the direction of egress.
"Every machinery room shall have an area of not less than 50 square feet.
"An unobstructed working space not less than 2 feet 6 inches in width and
not less than 7 feet in height shall be provided around not less than two
adjacent sides of all moving machinery in any machinery room.
"MACHINERY ROOM VENTILATION
"Sec. 1503. Every machinery room shall be provided with means
of ventilation to the outer air. Such ventilation shall be either:
"l. An exhaust system of ventilation arranged to provide a complete
change of air in such room at least once every five minutes and
discharge to the outer air at a location not less than 20 feet from
any exterior door, window or ventilation air inlet in any building.
-59-
"Each exhaust ventilation system shall be controlled by
a readily accessible emergency ventilation switch located
within 2 feet of the switch specified in Section 1509 and
the switch shall be labeled to comply with Section 1519, or
"2. Gravity ventilation openings to the outside of the
building having a cross-sectional area of one-twentieth of
the floor area of the machinery room, but in no case need
the area of the openings be more than 1000 square inches.
Such openings shall be so installed that approximately one-
half of the required area is located within 12 inches of
the ceiling and one-half of the required area is located
within 12 inches of the floor of the room. Every portion
of the lower opening shall be horizontal or slope downward
from the opening in the machinery room to the exterior of
the building at or above the adjacent ground level .
"EQUIPMENT IN A MACHINERY ROOM
"Sec. 1509. Combustion air shall not be taken from a
machinery room. [See Section 603 (c).]
"Electrical equipment or electrical control or control
panel other than listed below shall not be located in any machinery room:
1. Lights and receptacles.
"2. Machinery room exhaust fans and blowers.
"3. Any refrigerating condensing unit or portion thereof,
"4. Circulating pumps for condensers, cooling towers, or
cooling coils.
"5. Air compressors serving only automatic controls within
the refrigerating or cooling system.
"6. Electrically operated valves for the control of a
refrigerant or for the control of the circulation of
a cooling fluid,
"7. Blowers and fans for cooling towers or for condensers,
"8. Any electric control or control panel for any of the
above items.
"A readily accessible single emergency refrigeration control
switch shall be provided to shut off all electrically operated machinery
in any machinery room, except the exhaust ventilation system complying
with Section 1508. Such switch shall be controlled from a point
outside of, and within 10 feet of the required opening to the machinery
room it serves, and the switch shall be labeled to comply with Section
1519. For other requirements concerning the location of this switch,
see the Electrical Code.
REFRIGERANT PIPING, CONTAINERS, AND VALVES
Sec. 1510. All materials used in the construction and installation
of refrigerating systems shall be suitable for the refrigerant in the
system, and no material or equipment shall be installed which will
deteriorate due to the chemical action of the refrigerant or the oil ,
or combination of both.
"All copper and brass refrigerant piping valves, fittings, and
related parts used in the construction and installation of refrigerating
systems shall be approved for such use. (See Refrigeration Piping in
Equipment Standards, Appendix of this Code.)
"All iron and steel refrigerant piping shall comply with the re-
quirements of U.M.C. Standard No. 15-2. Pipe more than 2 inches iron
pipe size shall be electric resistance welded, or seamless pipe.
,60-
"Pipe subject to working pressure in excess of 300 pounds
per square inch shall have a minimum wall thickness of not less
than that specified in U.M.C, Standard No. 15-2; Table No. 15-2-A
for Schedule 80 pipe, or Schedule 40 pipe if all field joints
are welded. The use of longitudinal butt-welded pipe of Schedule
80 or Schedule 40 shall not be permitted.
"Iron or,steel refrigerant piping 1 1/2-inch nominal size and
smaller and containing liquid refrigerant shall have a minimum wall
thickness of not less than that specified in U.M.C. Standard No. 15-2;
Table No. 15-2-A for Schedule 80 pipe.
"Brass pipe, copper pipe and copper tubing shall conform to
the requirements of U.M.C. Standard No. 15-3. Brass pipe and copper
pipe subject to working pressures in excess of 250 pounds per square
inch shall be not less than extra strong pipe. Copper water tubing
used for refrigerant piping shall be not less than type K or L and
shall be free from scale and dirt.
"Soft annealed copper tubing regulated by this Section shall
be not larger than 1 3/8-inch nominal size. No mechanical joint
shall be made on any material larger than 3/4-inch nominal size.
"Soft annealed copper tubing conveying any refrigerant shall
be enclosed in iron or steel piping and fittings or in conduit,
molding, or raceway which will properly protect such tubing
against mechanical injury from an exterior source.
"EXCEPTION: The requirements of this Section shall not
apply to:
"l. Tubing entirely within a refrigerator or tubing
within 5 feet of a refrigerant compressor where
so located that it is not subject to external
injury.
2. Tubing installed in one- or two-family residential
buildings or in multi-family occupancies, when such
tubing contains Group 1 refrigerant and is placed
in underfloor locations or where not subject to
damage from an external source.
"ERECTION OF REFRIGERANT PIPING
"Sec. 1511. Piping and tubing shall be installed so as to
prevent excessive vibration and strains at joints and connections.
"All piping and tubing shall be securely fastened to a permanent
support within 6 feet following the first bend in such tubing from
the compressor, and within 2 feet of every other bend or angle.
In every case, piping and tubing shall be supported at points not
more than 15 feet apart.
"Refrigerant piping crossing an open passageway in any building
shall be not less than 7 1/2 feet above the floor unless against the
ceiling of such space.
"All refrigerant piping and tubing shall be installed so that
it is not subject to damage from an external source.
"Refrigerant piping and joints connected and installed in the
field shall be exposed to view for visual inspection and accepted
by the Building Official prior to being covered or enclosed.
-61-
"EXCEPTION: This shall not apply to soft annealed
copper tubing enclosed in iron or steel piping conduit,
molding, or raceway provided there are no fittings or
joints concealed therein.
"Copper tubing containing other than a Group 1 refrigerant
shall not be located in a public hallway, lobby, or stairway of any
building unless enclosed in iron or steel piping and fittings or in
metal rigid conduit.
"EXCEPTION: This Section shall not apply to hard-drawn
copper tubing installed in locations where not subject to
injury from an external source.
"All iron or steel refrigerant piping placed underground shall
be coated with sufficient asphalt paint or equal to inhibit corrosion.
"Iron or steel pipe joints shall be screwed, flanged, or welded.
Screw joints shall be of an approved type. (See Pipe Threads in
Equipment Standards, Appendix of this Code.) Exposed threads shall
be tinned or otherwise coated to inhibit corrosion.
"Welds shall be of an approved type. (See Refrigeration Piping
in Equipment Standards, Appendix of this Code.)
"Copper or brass pipe of iron pipe size shall be screwed,
flanged, or brazed.
"Every tubing joint and connection shall be a flared, lapped, or
swaged brazed joint.
"EXCEPTION: Soldered joints may be used to connect
any valve located outside of an air conditioning duct
or plenum to adjoining tubing in any refrigerating
system containing Group i refrigerant other than
carbon dioxide.
"REFRIGERANT CONTAINERS
"Sec. 1512. Every refrigerant container or evaporator which
is not a part of listed equipment, shall be constructed in accordance
with approved standards.
"REFRIGERANT CONTROL VALVES
"Sec. 1513. A stop valve shall be installed in the refrigerant
piping of every refrigerating system at the following locations:
1. At each inlet and outlet of every positive displacement
type compressor.
"2. At each refrigerant outlet of every receiver.
"3. At each refrigerant inlet of every pressure vessel con-
taining liquid refrigerant and having an internal gross
volume exceeding 3 cubic feet, which vessel is a portion
of a refrigerating system equipped with a positive dis-
placement type of compressor.
"Stop valves installed in refrigerant lines composed of copper
tubing 3/4 inch or less outside diameter, shall be securely supported
independent of the tubing or piping connected to such valve.
-62-
"PRESSURE LIMITING DEVICE
"Sec. 1514. A pressure limiting device shall be installed on
every positive displacement refrigerant compressor which is a portion
of:
1. Any refrigerating system containing Group 2 refrigerant.
"2. Any air cooled refrigerating system containing Group 1
refrigerant of 10 horsepower or more rating.
3. Any water cooled refrigerating system containing Group 1
refrigerant of three horsepower or more rating.
"Every pressure limiting device shall stop the action of the
compressor it serves at a pressure not in excess of 90 percent of
the pressure set forth in Table No. 15-B for the kind of refrigerant
contained in such refrigerating system.
"A stop or shut-off valve shall not be placed between any
pressure limiting device required by this Section and the compressor
it serves.
"PRESSURE RELIEF VALVES-COMPRESSORS
"Sec. 1515. The following compressors of the positive dis-
placement type shall be equipped with a relief valve:
1. Every Group 1 refrigerant compressor of 20 or more horse-
power rating which is a portion of any refrigerating system
operating at a pressure in excess of 15 pounds per square
inch in the high pressure side of the system.
"2. Every compressor which is a portion of any refrigerating
system containing any Group 2 refrigerant.
"EXCEPTION: The requirements of this Section shall not
apply to a' compressor listed without such relief valve.
"Every pressure relief valve shall be connected to the refrigerant
discharge side of the compressor it serves, between such compressor
and any stop valve.
"Every pressure relief valve required by this Section shall dis-
charge into the low pressure side of the refrigerating system it serves
or discharge to the outside of the building as required by this Code.
Any pressure relief device that discharges from the high pressure side
of the refrigerating system into the low pressure side must be of a
type that is not appreciably affected by back pressure.
"Every pressure reliev valve required by this Section shall be
set to function at a pressure not in excess of the pressure set forth
in Table No. 15-B corresponding to the portion of the refrigerating
system in which such valve is located and the kind of refrigerant
contained in such system.
"A stop or shut-off valve shall not be installed between any
pressure relief valve required by this Section and the compressor
it serves.
"PRESSURE RELIEF DEVICES - PRESSURE VESSELS
"Sec. 1516. Every pressure vessel over 6 inches in diameter
which may be shut off by valves from other parts of the system shall be
equipped with a pressure relief device or devices complying with
requirements of this Code.
-63-
pressure relief valve, fusible plug, or rupture member, provided,
however, that a fusible plug is permitted only on the high pressure
side of the refrigerating system.
"Pressure vessels having a gross volume of more than 3 cubic feet
shall be equipped with a pressure relief valve or rupture member.
"PRESSURE RELIEF DEVICE REQUIREMENTS
"Sec. 1517. Except as provided in this Section, every
pressure relief device for any refrigerant vessel shall be set to
function at a pressure not exceeding that set forth in Table No. 15-B
for the portion of the system to which the device is connected
and for the refrigerant in such container.
"Pressure relief devices may be set to start to function at
a pressure not to exceed the design working pressure of the
pressure vessel as determined by the manufacturer and stamped on-the-
pressure vessel.
TABLE NO.15•B-PRESSURES FOR UNLISTED EOUIPMENT
C C URE
PR :ESSGR PRESSURE RELIEF VALVES
PRESS Alfa DEVICES OPERATING
DEVICE
LIFI( E PRESSURE
In Pounds per
PRESSURE
TIRO (Square_Inch)
PPoundsE
RGRI Gt RANT tlSqu:re/neh)r 1High Pressure-f low Si�csu—re
;ra ISide
Ammonia 225 230 � 150
---_ - ---
Cai Dioxide 1200 1350 1000
1 --, —
Dichloroctl:ylcnc -- -I -5 --10 10
Dichlorotncthaue 25 :30 30
Refrigerant I j
Ethyl Chloride 50 ^55 50
Trichloroethylcne 25 30 30
Tricl,iorotnonofluoromethane 25 30 W
(Refrig,,miit 11)
D;chlorodifiuoroniethane— -—160 225 125
(Refrigerant 12)
Dichlorocuouofluoromcthane 60 TO 50
(Refrigerant 21)
Mot ochlorodifluo rot ncthane 245 300 245
(Refrigerant 22)
•1•ric•lil(,rotrilluoroctltanc --- 25---- 30 -- ---30--
(Refrigerant 113)
Dichlorotetraflunrocthano _ -45- — 50 50
(Refrigerant 114)
Methyl Chlnridc —_ ----170-- --SOU - —lob MethylForinate — 25— - 30 —30--
Sulphur Dioxide 125 150 05
Refrigerant 500 160 22.5 125
Refrigerant502 245 300 I50
"'lie minimum required rated discharge capacity of the pressure
relief device or fusible plug for a refrigerant-containing vessel shall be
dctermined by the following:
C = f X D X L
WHLRE:
C=Minimum required discharge capacity of the relief device in
pounds of air per minute.
D=Outside diameter of the vessel in feet.
/.=Outside length of the vessel in feet.
f=Factor depending upon kind of refrigerant as follows:
Kind of Refrigerant Valve of f
.Atntnonia 0.5
R-12, H`22,and 11-500 1.6
f1-502 2.2
All other refrigerants 1.0
—64—
"The size of the discharge pipe from the pressure relief
device shall be not less than the size of the relief device outlet.
The discharge from more than one relief device may be run into
a common header, the area of which shall be not less than the
sum of the area of the pipes connecting thereto. Whenever the
length of the discharge piping exceeds 50 feet, such piping
shall be increased one pipe size in diameter.
"All piping and fittings used for any relief device discharge
piping system shall conform to this Code.
"Every pressure relief device shall bear thereon:
"l. Name or trademark of the manufacturer of such device.
"2. The discharge or bursting pressure setting of such
device expressed in pounds per square inch gage.
"3. The minimum diameter of the discharge outlet or
opening of such valve.
"4. The discharge capacity of the pressure relief device
in pounds of air per minute.
"Every pressure relief valve shall be set and sealed by the
manufacturer of such valve or any such valve may be set and sealed
in a laboratory approved by the Building Official , provided such
valve is properly relabeled.
"Every pressure relief device required by this Section for any
pressure vessel of three cubic feet gross volume or more containing
Group 1 refrigerant or any pressure vessel containing any Group 2
refrigerant shall discharge to the atmosphere at a location not less
than 15 feet above the adjoining ground level and not less than 20
feet from any window, ventilation opening, or exit in any building.
"Every pressure relief device required by this Section shall
be connected as close as practicable to the refrigerant container
or evaporator it serves and above the refrigerant level in such
container or evaporator.
"A stop or shut-off valve shall not be placed between any
pressure relief device required by this Section and the pressure
vessel it serves.
"MANUAL DISCHARGE OF REFRIGERANT
"Sec. 1518. (a) Discharge to Atmosphere. Every refrigerating
system located in a building and containing carbon dioxide or a Group 2
refrigerant shall be equipped with means for manual discharge of the
refrigerant to the atmosphere. Such discharge system shall comply
with all of the following requirements:
-65-
"1. A discharge pipe shall be provided above the liquid
refrigerant level from both the high and low pressure
side of the system and the pipes shall extend into an
emergency refrigerant control box complying with this
Section. Each discharge pipe shall have a minimum
nominal diameter of 1 inch.
"2. A readily accessible stop valve and a high pressure
gage shall be installed on each discharge pipe within
the emergency refrigerant control box. The gage shall
be located ahead of each stop valve and the valves shall
have the same capacity as the discharge pipe-it Serves.
A permanent label shall be attached to each valve
reading: "Discharge Valve to Atmosphere" and shall
indicate the side of the system to which it is
connected.
"3. Each discharge pipe shall extend from the discharge side of
the valve to a common pipe having a nominal diameter of 1
inch. This common pipe shall terminate outside the
building, not less than 6 feet above the highest structure
on the building and not less than 20 feet from any window,
ventilation opening, or exit, of any building. The
outlet opening shall be capped with a low pressure rup-
turable diaphragm, such as a heavy foil disk in a pair
of flanges, or equivalent.
"4. A stop valve, which could prevent manual discharge of the
refrigerant to the atmosphere, shall not be located be-
tween the emergency refrigerant discharge valves and the
side of the system they are serving.
(b) Release from High Pressure Side. Every refrigerating
system required to have means of manual discharge of its
refrigerant to the atmosphere also shall be equipped with manual
means of releasing the refrigerant from the high pressure side of
the system to the low pressure side. This manual means shall
comply with all of the following requirements:
"1. The high and low pressure side of the system shall be
interconnected with a pipe having a minimum nominal diameter
of 1 inch. This interconnection shall be made above the
liquid refrigerant level .
"2. A readily accessible manual stop valve shall be installed
in this interconnecting pipe, and the valve shall be
located within the emergency refrigerant control box. This
valve shall have the same capacity as the pipe connected
thereto.
I. A permanent label shall be attached to this valve reading:
"High to Low Pressure Control Valve."
"4. A stop valve, which could prevent releasing of the re-
frigerant from the high pressure side of the system to
the low pressure side, shall not be installed in this
interconnecting pipe between the high and low pressure
side of the system.
-66
"(c) Emergency Refrigerant Control Box. Every emergency
refrigerant control box shall be located outside of the building
on a street front or shall be equally accessible and shall be not
more than 6 feet above the sidewalk or adjoining ground level . This
box shall be of iron or steel not less than No. 16 gage thickness
and provided with a hinge cover and lock. Such box shall be
Provided with a permanent label on the outside cover reading:
'Emergency Refrigerant Control Box" and the name of the refrigerant
in the system.
"All piping, valves, fittings, and related parts, required to
be installed to comply with this Section, shall conform to Section
1510 of this Code.
"LABELS
"Sec. 1519. In addition to labels required elsewhere i.n this
Code, every refrigerating system shall be provided with labels
complying with the requirements of this Section.
"Every condenser, receiver, absorber, accumulator and similar
equipment of more than 3 cubic feet gross volume and containing any
Group 2 refrigerant shall be equipped with a permanent label setting
forth the type of refrigerant in such vessel. Every vessel having a
gross volume of more than 10 cubic feet and containing any Group 1
refrigerant shell be equipped with a permanent label setting forth
the type of refrigerant in such vessel .
"Every manifold or distributing panel shall have a permanent
label$ setting forth the refrigerating equipment controlled by each
valve on such panel .
"All exposed refrigerant piping shall be labeled at intervals
of not more than 30 feet apart plus a label in every area through
which the piping extends specifying the refrigerant in such piping.
"EXCEPTION: The provisions of this Section shall not
apply to:
"1. Piping in brine tanks.
"2. Piping in that portion of any building used
exclusively for ice making, cold storage, or
for the processing of any material by means
of refrigeration.
"Every refrigerating system, which is required to be located in a
machinery room, shall be equipped with permanent labels having letters
not less than 1/2 inch in height designating the following equipment:
"l. The main power disconnect switch for such refrigerating system.
"2. Every remote control device for any such main power switch.
"3. The main shut-off valve for each liquid refrigerant container.
"4. Every pressure limiting device and pressure relief device
located outside the room or space in which the refrigerant
container it serves is located.
7-
"Every exhaust ventilation system control switch required
to be installed to comply with Section 1508 shall have a permanent
label reading: "Emergency Refrigeration Switch."
"Every control switch provided to shut off all electrically
operated machinery in a machinery room, as required by Section 1509,
shall have a permanent label reading; "Emergency Refrigeration
Switch."
"In every refrigeration machinery room and for every direct
refrigerating system of more than 10 horsepower there 'shall be
placed a permanent sign within 10 feet of the compressor giving
the following information;
1. Name of contractor installing equipment.
"2. Kind of refrigerant in system.
"3. Amount of refrigerant in system.
"Every pressure relief device required by this Code shall be
labeled to comply with. Section 1517.
TESTING OF REFRIGERATING EQUIPMENT
"Sec. 1520. All refrigerant-containing portions of every field
assembled refrigerating system intended or installed to operate at a
pressure in excess of atmosphereic pressure shall be subjected to a
test pressure of not less than the pressure set forth in Table No. 15-C
for the kind of refrigerant in such system.
"Pressure tests required by this Section shall not be less than the
lowest setting of any pressure relief device installed on the side of the
system it is protecting.
"The requirements of this Section shall not apply to;
1. Any refrigerating system containing 20 pounds or less
of Group 1 refrigerant.
"2. Safety devices, pressure gages, compressors, and control
mechanisms which have been factory tested.
"3. Pressure vessels constructed in accordance with approved
standards.
"The test pressure applied to any refrigerant container shall not
exceed two and one-half times the design working pressure stamped on
such container.
"The high pressure test for any refrigerating system intended to
contain any refrigerant not listed in Table No. 15-B shall not be less
then the saturated vapor pressure of such refrigerant at a temperature
of 150°F. In no case shall the test pressure be less than 30 pounds.
"Every refrigerating system installed to operate at a pressure below
atmospheric pressure shall be required to maintain a partial vacuum in
the system equal to the pressure of a column of mercury not less than
20 inches in height.
"Every refrigerating system shall sustain the test pressure specified
in this Section for a period of not less than 10 minutes after the
pressure imposing equipment has been cut off or disconnected.
,68-
"Every pressure test for those portions of any refrigerating system to
contain ammonia or carbon dioxide shall be made with air or dry gas.
"Refrigerating systems shall not be tested with oxygen..
"Brine piping may be tested with air, water, or dry gas.
"All brine piping which is a portion of any refrigerating system
shall be tested to a pressure of not less than 100 pounds per square inch
for a period of 10 minutes.
TABLE NO.15-C—FIELD LEAK TEST PRESSURES IN POUNDS
PER SOUARE INCH
HIGH PRESSURE LOW PRESSURE
RMIGERANT TEST TEST
Ammonia -- — --_--_ �— 300 150
Carbon Dioxide 1500 1000
DieWoroethylene 30 30
Die]loronmthano(Refrigerant l) —30 �30^
Ethyl Chloride GO 50
lYiehlorgcthylcnc 30 30—
1'richl"romunoituoromcthano I 30 30
(Refrigerant 11)
Didbloradifiuoromethane 235 140�—
(Refrigerant 12) --Vl
Dichloruruonofluoromctl:ane 7.0 — —10—
(lirfrigrraut 21)
Mouoch4rrodilhuuumcthano —300-- — 150 -- +
(Rof rigerant 22)
Trid:lorutrifluoroethane 30 30
(1lcfriger:mt 113)
Dichlorutetrafluorocthdne — 50 50—
(Refri;eraut 114)
Methyl ClAoride - --� I 210
Methyl Formate 50 50
Sulphur Dioxide 170 85
Refrigerant 500 225 125
Refrigerant 502 300 150 —
Additional tests of any refrigerating system may be demanded by the
Building Official when deemed necessary to insure the safety of
such system. . '
Every test required by this Section shall be conducted by the owner
or contractor in the presence of the Building Official.
c69-
L4 J f tonci it ?ro: _lion
�i
5 Eat,. s ivv"3 .c 9o1,l J., rm :cct,anicz(Cooe.
Asa cf ic�l��
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vex s may No when
snCil d.,si„ ,,...,:w:;has.,...:o ;ov,1 oy............. :):..�......
used in T.;a s Nos.C-9-A.C-:i-u and C-9-C
are as indicated in i'i c:cs I ai,Ul °.bciow.
YN T
�L— GAP i —L_ y
I D
fi�un Ka1 F�nNSZ
T:CZ.W -VEPJl :,SCESTS
Ci.:�i�tT TYYi:�Vi'�T51'��,'.iiG :G.ti�„Ci Gn'S
'
G f_12 1
(f '.t)
0 .1 ) ( 1 1 ? I 1 1 7,01
�o 1 177 27 1—
lii
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;.l -
i ; .�. 3.i i L7 a
to a J.,. ( 1 l .,
s
j 20 _ I 273 3 j
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I j 2io zS)3 .10 Fi J•t ,(LJI
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I II
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73
TACLE NO,C,9.$_CAPn.SITY OF TYP:.".C."rt','.L=::'.:l V .':T:'"^.:!T;'P:3 D".L&,WALI CONNECTORS
at Yam ventDamefer-f4,e:ee; ��~
n`;i:.nl�LJtsgt _
—"u 6 )(i ! 5: 3 o s o 1 i, i i . ,Til)cn sac) n!so 3sso
6 � (i 36 6i 1 ,�l� l , 15 ( >10 .1,7) �l1 0 3 70 1h51) 22'10 Wit)
h 3. .i1 , , ) � ( 73 :.1, ( 0 670 � 1 tl 1F2q ',?^10 2(i.51i
1 s 55 im, ! A1 ,o No , 0 11 W ( 1 s30 NO 2W) VW0
0 51) 'I 1 ) it 1",o ( 1',
'�iJ t 17 0 30 27.50 33bU i�)1it
u I ( 17 2 , , 1020 t '310 3 :) 2111) ^5(0 11.50
b S 1 3 ) i if .) 1' l) I(;lt 070 3t)
,.,:) t 60 C(i0 2035
U 53--" _. , !� i"— ! :) 91V.,0 3 141 1 4t;,)
�o Y .�.)i C:a�-} `J ... ., I ;,),.l 1 . 1 0 '� j :10 l-, i..35i)
It 15g 112 7� 5 i V, I + on DWI
2 46 93 r —tt U "I 3ll0 41iti1
15 15 37 i 1 ( ( ,O I w 3S0p 3'm
30 00 11 1,, , i �1 > , h,> 15, i ,l it 6 0 u t j S"AW
0 61 lit '� 1417 lot j� 1 :S V i on „ _ (1-� 1 41 lit lri)
2 51 wit i I , i 1 j I } .} 1: ) r 1) 1 w 1)101 17,;,1
20 10 •14 h0 I ISi, 2n I :! •1 i:! 7 r 1 .i 1 ri! 1 U :103, ,l.iu s�i0 440(1
'20 35 lh; I.r -l0 ,rs 1 •110 60 .:,; l...ii) lh;,f) „•):1O .112 .354 4•i5t1
30 68 !3U t i) 27:3 3K0 ti?ii in 1_T0 l701) 233U 2!)40 9F511 43!xl
Thol VAnl G.2rctrf t 11 1—
Mn hl Lall
Ua0 tiuU
0 64 125 „0 336 1 55 ( tl u.:(I r lot
3770 4750 55�(1 Oa0
30 ) Sli 1
120 11 NI l 14 .3 ;.l > 50 atilt) 4� di,)
2(1 911 15 S � �.iT � 4 7 !;{ ) _� ) ,70 a sS(l ) 5-kl
NK Nil �T115 _1,., i 1
wi—
�
4i1 .1050
20 4)h 16 i.l 1 - $I( ( ..) 1 5.
40 Nli ,1 i .1 , ) n„ I 1'1,i _t m � 'y 0 � �a8 (i ;' m I { .0 I 5ti2;1
Is _--- 1:,ii l2$( i 1—I i 'i I 11°'u t,'0 0 ib 0 I t) �LLiIU 3SO N,;U
tiu 125 31, � u l u tr o `(itll( ,•unl
3u 170 I :, I i S„ I ,t211.10 711 I ;0 n auu
_ 60 _\N I fit i 47NCO
, a 1 0 on
HO 2 217 I 3 U 14 i , I I � f) 5iI 1 )
40 1 is i 1u I �. i
_ 1 _ NH N U I 1{.0 01I0 27,) Ib511 ,�,8I r0
�it '(i0— 0 )7 ,. -',J i .Y,11 0 111,00 (7tl(1 h( 1, 1
Itx) Sil 411 3 5 5,05 5,lT7uu5 .;%1 Sb00
111J0 1 5( _ .�(1 3100 4050 5du(1 6600 Kl0
100 h70 I.13t) 2i):r0 2t.30 3750 •It): 6100 75uu
74 -
Symbols and notes for multiple appliance vents covered in Tables
Nos.C-9.1D,C-9-C and C-J-' anti as indicated below:
�t
VENT CAA
` �•---
TOTAL VENT T07AL VENT
'NEIGNT N NEIGNT
p_ CONNECTOR i I I CONNECTOR
tt P. '
RISE "R' l! f' RISE P.
1
- Fltiure 3 Fiaun4
Dcubie.Wail or Asbestos Cement Mawry Chimney Senino
Type a Vents.Selina Two or More Tm or More Appiiam"
APDIIUSes.(See Tabl_aNOLC-S-O (See Table Na C-24.)
and L)
1.The connector length shall not exceed 1 Vh feet for every inch of
Connector diameter.
2.The connector capacity shall be reduced 10 percent for each
80-degree turn in excess of two.
3.The common vent capacity shall be reduced by 10 percent for
each 90-degree turn in excess of two.
4. Connectors shall be equal to or larger than draft hood outlets.
{ S. If both connectors arc the same size,the common vent shall be
at least one size larger,regardless of tabulated capacity.
6.The common vent shall be equal to or larger than the largest
connector,
7. Interconnection fittings shall be the same size as the common
vent.
8. For high altitude installation the sea level input rating shall be
used for calculating the vent size.
TABLE NO.C-9.C—CAPACITY OF tAA$ONRY CHIMNEYS AND SINGLEMALL
VENT CONNECTORS SERVING A SINGLE APPLIANCE
Tabl VentSin ta•Wall Yont Connector DiamBler—p(inches)
Ncipht Uteral To be used with cMrnney anal not I—ft.thane al bottom
M L r-3 4
lean Itcee Maximum Applianpe Input aunp in.A Theusantls of ON Per Mour
6 2 28 52 86 �I 180 217 400 Ss0
5 48 St 11,8 1G. 230 375 560
2 29 5u 93 135 1117 26 4-:7, 650
8 5 51 h7 133 1 h 2 246 42.2 638
I1 10 70 123 161) 233 400 598
2 31 61 1ti2 161 220 297 .191 722
5 56 S 147 20.3 276 465 710
10 10 &0 IV M 201 441 665
is 125 1,5 2-16 421 634
2 67 113 178 249 335 5t O I 840
S 61 106 163 230 312 531 825
15 10 06 151 21.1 29W 504 77.1
! 15 138 19r1 2iK 481 738
20 1K4 261 i59 706
} 2 73 12.3 200 273 37.1 625 950
5 115 183 -52 3.18 59l t 930
20 10 170 235 330 562 875
15 156 217 311 536 &35
20 203 292 510 800
2 136 215 302 420 715 1110
5 196 279 391 680 10W
30' 10 260 370 64.1 1020
15 349 615 975
20 327 585 932
30 544 865
2 I 610 `n40
5 r0 i_20
10 723 lao
'5 605 1090
20 t0.;o
30 97o
finimum Ir.tcrna
Mt.ofChimncyA 19 28 38 50 63 05 132
Square Inches
See TJ I.Fa Gu.0 fw oawnry Chimney linentaes.
See FiNun 3 far einyle epplfalr»Yea16.
75 _
TAOLE NO.C-9.0-C:PAC:-,'. :; i.O:OUOLE-VIALL VENTS WITH TYPL 0 DOUBLE-WALL CONNECTORS
5MVING TWO OR MORE APPLIANCES
Vont Carn•ctsr Cwcity
T aaf _ _Ys+kCMnactor0iamatu—OtincF.a:}
it, ��i�
M:4M W a a i 0 7 f if 17 U U 1f 70 77 21
M •
pull IMay f,:arimu�n Appllgta Inpu(OMlnf M Tt�taW N OW►.r Your
1 _ 46 72 -iO4 1.12 IN5` -284 -_A11 5,77 Tss 955 1180 14ZS 1700
6 2 55 86 124 210 315 4fNi 653 K53 10ff0 1335 lfil(1 1920
3 fill 96 139 1.9 248 386 556 740 967 1225 1510 183I1 2180
! 7 48 ;6 i 10i 14 16.1 ki 43+%�li01 805 1015 1255 ib2(1 1811)
8 2 57 flo i") 175 230 358 51(i 601i Wo 1150 1420 17'21) 2050
3 64 101 1.15 198 2S8 4022 54i0 790 l(Q0 1305 1610 11150 23-71)
t 50 TN In 154 2(Xi 314 452 642 840 IMO 1310 1585 18fM)
to r,} 99 U3 134 182 23H 372 536 7311 955 1205 14WI 1NM 2150
j 67 104 I50 20S 2M 417 6(K) 82_7 1080 1370 IW) 2M0 2430
83 83 120 163 214 333. 480 W)7 U10 111 1 1420 1721) 2LL5()
19 412 4/f/ 14^_ 1f� 253 304 S6H 7U0 IU30 t3U5 1610 If)50 232U
71 111 1rA) 218 286 444 &10 898 1175 1485 IN35 2220 2640
1 96 87 125 171 224 . 347 5UU 740 965 122S 131U I830 21M)
26 ! 104 140 202 263 414 506 840 101.4 1385 1716 2070 2470
3 74 116 168 228 3()0 466 672 052 12.15 1575 1045 23.50 2800
1 b0 Q3 134 182 238 372 536 805 1IL50 131U tfi45 lf19U 2370
so 2 70' 110 158 215 282 430 632 910 1190) 1.M 1855 2240 2670
2 79 124 178 2,12 317 4U4 712 1035 15%, 1710 211() 2550 3040
2 07 116 F)0 248 3N9 9(T0 )Ci(1 1110 1405 1735 21{K► 51N1
40 2 I 73 115 166 225 295 461 665 U64 1260 1590 MiiS 2380 200
3 83 129 187 A 253 331 320 748 1100 1435 1820 2240 2710 3230
1 1(14 l50 204 266 417 6(K) U26 1210 1530 189ll 22tii) 3':O
40 to 2 70 123 178 2.12 316 494 712 1050 1370 1740 2150 2590 316!,
t00 3 IN 1311 200 272 355 555 800 1108 150 1080 1 2450 1 2960 3w:..;
common Vaal Capacity
C..r.aar a 4..hr—a 6.rs.0
wrr
i • • 4 T. • O 1 it fa is It 4 fa M
w CMOb1N biley I.— -ndsofaWhcNNN
6 - 65 103 147 200 260 410 W)588 81s 15 1345 1660 I970 23)M1
A 73 114 163 223 Z'X) 445 W12 012 Ilfx) 1510 Iw) 22(K) 2(1M)
to 70 L24 178 242 315 495 712 9M) 1300 16.15 2030 24U0 29-40
IS - 01 144 206 2Nt) 365 365 82.5 1158 ISM 1010 23fi0 2790 34M
20 - 102 1611 229 310 403 (i0) 916 12fM) 16f8) 2140 2(WO 3120 38(K)
30 - 118 .185 266 360 4TO 740 1Q25 1525 1-K) 2520 3110 36W 44144)
40 - Lu 203 2U5 405 52.5 820 I180, 1715 224U 2830 35(MI 4150 5050
N() 224 324 440 575 9(K) 1380 2010 2620 3320 41(X) 48W SUM
Nil 344 4fiN (ills 955 15411 225/i 2U1U 371i) 45fK1 5420 fililM)
1(m 4711 625 07S 1670 2.150 32IK1 4(150 I 5(KK) I 592ti I T2)M
.«v,rwr:t.nd�Mrt�aa+•yiMryp(W.arrY.
76-
_ '=TY OF SI NGL-t.:L..i. -
ASi ESTGS I. �T T't i-::: ,
TViO OR MORE APPLIAt'''_S
c.ngie Wall Vent Connector Capacl,
I Yenl CeneeJer D:ametar_D iinche*.�
'`"'t�' 'r YYlnurp Appyenninput]at'.ng in
lllwsa of Btu Per Nour
21 40 6R 103 205
6to 28 53 86 12; IT 1 25
i 34 61 98 147 :::,-t 275
1 1 23 44 77 117 179 240
�5 30 56 92 134 IN 265
3 35 64 102 155 216 2W
30
25 49 114 129 190 270
ano r.p 2 31 58 97 145 211 205
3 36 64 232 321
Cmltroen Vent Capacity
Camnpe Venl DiameNr(incMsl
TwI VW ♦ S e 7 e 1D 12
W'.gnl
n Gmalned Ards of
lrPer nating in
n..n inousands al Ru Per Nour
6 48 78 111 155 205 320 \R
8 55 'V) 12F. 175 234 3515 505
IO .19 & 136 190 C30 95 560
15 71' 115 ib9 228 :,iZ 460 600
20 80 129 �86 WO 340 550 700
30 147 215 300 400 650 040
50 360 490 810 1190
s»ra..s�a..ww.wtecot.aNifuep...r
TABLE NO.r-9•F-CAPACITY Of A MASONRY Cl111MNEY AND SINGLF•WAU.VENT
CONNECTORS SERVING TWO OR MORE APPLIANCES
SinnIa•Wall Vent Conncctor Capacity
Yent Cannedar Dlaman_D Iinchn)
..rel n.�ta
e w C_-..CT- I�
4 ' It V.I.-Appliance input Rating In
IN.0 1 peen _ TtousandsWDtu hrNaur
ri I 3'�f,fi tKl�—itci 2i;0
123 172 i;3;
6l 'i7 142 202 2!i9
23 43 73 11- 17i 225
15 30 54 68 132 1t,()
3 34 63 101 151 213 289
30 i 24 47 80 124 , 183 250
a"up 2 31 57 03 142 205 252
3 35 65 105 160 229 312
Common Chimney Capacity
Minimum Internal Ara.of Chimney—A
TW I VeM isq—t lnchnl
micki 17 1 28 ]a SD 7e 113
H
then Cent inN Appliance input haling in
Thouswres el at.Per Naar
6 45 71 i02 142 245 \R
8 52 81 118 162 277 405
10 n. 56 89 129 175 300 450
15 66 105 150 210 360 540
20 74 120 I70 240 415 640
30 133 195 275 4W 740.
50 325 600 910
Me TAW N.Calf III...nonrchtmne,liar A—
awIllowAliedseeeslet .kipMyp Wr wua
77 -
TALI,E?"0.C-b-C—.1A A SON,.V! ill's
V.,I T i Ci ZULL:R_I a ulv,*,.L;.,
L; S:z
2V:x 6V2
6 28.3
7 3 6.3
'3 ni'�x 6% -112.7
6 x 10 6Va x IOVz 9 I 63.6
10 I 76.5
1 2 x 1 2 93i x 9:Y4 10.4 S3.3
12x 16 955x13Si j 11.6 107.5
12 113.0
l'I .
16x 16 j 131/4 x 1314 1'i.5
is
16.2U 3 x 17 16.2
20 x 20 .61/,x 161/, '`::2
20 x 2, 6,*/.,x 20 V, 3 2
214 x 24 2 01/4 x 2 01/4 22.1
1 22,
x 28 G 1A x 2-11/4 2-1.1
28 x 28 '41/ 1
26.4 5 3
2-
30 x 30 ;5/2 x 2.514 27 cJ ci7
3(as 2.5V2 x 3 11/- 3())'9
33
�6 x S'F 3 V-Y.31'A
,r City of Fort Worth, Texas
Mayor and Council Communication
LI,
BAILIFF DATE REFERENCE SUBJECT: PAGE
NUMBER Proposed Amendment to
dR°`~^'' 10/21/74 G-2534 of l
Mechanical Code
PAlGE
On December 21, 1970 (M&C G-1676) , Ordinance No. 6408 was adopted establish-
ing the Mechanical Code of the City of Fort Worth. This code was based pri-
marily on the 1970 Uniform Mechanical Code, with some changes and modifications
to relate the Code more appropriately to local conditions.
The International Conference of Building Officials updates and reprints the
Uniform Mechanical Code every three years. As required by the Code, the
Mechanical Board has reviewed the City's Mechanical Code and the 1973
Uniform Mechanical Code and has proposed amendments to the City's Code.
7 A L
The changes generally eliminate local amendments thought to be unnecessary
4� and bring the Fort Worth Code more in line with the Uniform Code and codes
• of other cities in the North Central Texas area.
r � A major exception to this trend toward uniformity is the addition of the
requirement for automatic fire extinguishing systems to be used with
commercial cooking equipment. This local provision conforms to Article
5.43-1 of the Insurance Code of the Statutes of Texas, which the Building
Division has recognized. Through the enforcement of these standards,
cooking fire losses have been reduced by more than $400,000 during the
last 1'&I years. The decrease in fire losses has undoubtedly been a factor
in the two 5 percent reductions in fire insurance rates that Fort Worth
citizens have been granted in recent years.
The proposed ordinance amends the fee schedule by (1) restating charges
in & more orderly manner, (2) including three items inadvertently omitted
from the present code, and (3) providing fees for inspections of automatic
fire protection systems.
Review by Industry Representatives
The proposed code amendments have been submitted to thirteen local organi-
zations of contractors, laborers, engineers, and architects. No objections
have been received on the proposed changes. The Code Specialist for the
Area Office of the U. S. Department of Housing and Urban Development has
also reviewed the amended code and found it satisfactory.
Recommendation
It is recommended that an ordinance be adopted incorporating the proposed
amendments in the Mechanical Code of the City of Fort Worth.
RNL:co
SUBMITTED BY: DISPOSITIO COUNCIL: I PROdfSSED BY
PPROVED O OTHER/(DESCRIBE) t4cRARY
DATE
CITY MANAGER