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ORDINANCE N0. !~
AN ORDINANCE AMENDING TABLE 25-D, SECTION 2501(b) AND TABLE 25-F OF
SECTION 7-167 "MECHANICAL CODE AMENDMENTS10 OF THE CODE OF THE CITY
OF FORT WORTH (1986); REVISING MINIMUM INSULATION REQUIREMENTS FOR
PLENUM SPACES, METAL FITTINGS AND METAL AIR CONDITIONING DUCT SYSTEMS;
PROVIDING FOR ENGROSSMENT AND ENROLLMENT; AND PROVIDING AN EFFECTIVE
DATE.
BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY OF FORT WORTH, TEXAS:
SECTION 1
Table 25-D of Section 7-167 of the code of the 'City of Fort Worth (1986)
is amended to read aslfollows
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TABLE 25 - D
Minimum Insulation Requirements
For Plenum Spaces, Metal Fittings and Metal Air Conditioning Duct Systems
Insulation Types And
DUCT LOCATION Thicknesses That Are
__ Acceptable
1
SUPPLY and RETURN DUCT systems Exterior
~ _
3", 0.75 lb/cu ft FSK WF.AP Y
of Building and exposed to outside ~ 1~", 1.S lb/ cu ft Duct Liner
temperature and weather ® l~", Type 475 or 800 Duct Board
® or equivalent to provide an
installed conductance 0 16
2 SUPPLY and RETURN DUCT systems located ~ 2", 0.75 ib/ cu ft FSK WRAP
in attic spaces outside the building ~ 1"
1.5 lb/ cu ft Duct Liner
envelope insulation ,
SUPPLY and RETURN DUCT s;~stems located ® 1", Type 475 or 800 Duct Board
in mechanical equipment rooms, furnace
®
or equivalent to provide an
enclosures, shaft enclosures and any
other spaces connecting or ventilated installed conductance = 0 24
with unconditioned air.
SUPPLY and RETURN DUCT systems located
outside of the building envelope
insulation but inside the building
other than attic spaces
SUPPLY DUCT located in under-floor crawl
spaces ventilated as required by the
_ Uniform Building Code (Note 3~
3 SUPPLY DUCT systems located inside of the ~ 1"
0.75 lb/ cu ft FSK WRAP
building envelope insulation, such as ® ,
2.0 lb/ cu ft Duct Liner
~+'
building spaces used as a duct or plenum, ,
floor or roof/ceiling spaces, equipment ~ ~", Type 475 or 800 Duct Board
rooms, shaft enclosures and unventilated
under floor crawl-spaces. ® or equivalent to provide an
(Note 1 and 2) installed conductance = 0 48
RETURN AIR DUCT systems in under floor
crawl spaces ventilated as required by
Uniform Building Code
(Note 3)
4 SUPPLY and RETURN DUCT systems located NONE REQUIRED
in nonconcealed conditioned spaces.
RETURN DUCT SYSTEM in all locations not
listed above
NOTE 1: Insulation may be omitted on a maximum of six (6) feet length of
branch or run-out ducts to a ceiling air diffuser and on the diffuser
when located in building spaces used as a return air duct or plenum
2: Envelope insulation of R-11 is acceptabl e
3 Reference Section 251b (c) lE6 of U.B. C
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SECTION 2
Section 2501(b) of Section 7-167 of the Code of the City of Fort Worth (1986)
is amended to read as follows:
Section 2501(b) Deleted, See Table 25-D for Insulation Valves
SECTION 3
Table 25-F of Section 7-167 of the Code of the City of Fort Worth (1986)
is amended to read as follows:
Table 25-F. Deleted, See Table 25-D for Insulation Values.
SECTION 4.
The City Secretary of the City of Fort Worth is hereby directed to engross
and enroll this ordinance by copying the caption and effective date in the minutes
of the City Council and by filing the ordinance in the ordinance records of the city
SECTION 5
This ordinance shall be in full force and effect from and after its passage,
and it is so ordained
APPROVED A5 TO FORM AND LEGALITY
City Attorney
Date
ADOPTED / O~.I
EFFECTIVE : / ~~ ` ~
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DATE
~ REFERENCE
NUMBER SUBJECT AMENDMENT TO THE MECHANICAL PAGE
F
3AR ~~ f5O~ CODE OF THE CITY OF FORT WORTH 1
~3-X81-8~-~ G-7973 (ORDINANCE N0. 8907) ' °`~~-~
RECOMMENDATION
It is recommended that the City Council adopt the attached ordinance amending
the Mechanical Code of the City of the City of Fort Worth (Ordin ance No.
8907) as provided below.
DISCUSSION
The Mechanical Code of the City of Fort Worth (Ordinance No. 8907, as
amended) regulates the duct insulation requirements for heating and cooling
systems. The City staff is recommending an amendment to the code by deleting
and changing some requirements, clarifying other requirements and locating
all duct insulation requirements into Table 25-D.
The Mechanical Board of Appeals has reviewed the proposed cha nges and
recommends that they be adopted.
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Attachmen t
APPROVED BY
cin cot~c~~
MAR 21 1969
Citq Sectetnip' of the
Cilp of Fon oVoY.b. Tru~a~
_
SUBMITTED FOR IFit
CITY MANAGER'S
DISPOSITION BY COUNCIL.
PROCESSED BY
OFFICE BY D ~ d Ivor ^ APPROVED
ORIGINATING C OTHER (DESCRIBE)
DEPARTMENT HEAD• J . gi 1 ardi CITY SECRETARY
FOR ADDITIONAL INFORMA71ON 4 ,j n ^ ,{
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