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Fire Partition penetration

sergoodo

SAWHORSE
Joined
Oct 27, 2009
Messages
306
Fire partition extends to underside of roof sheathing. Partition is penetrated by 2x12's holding up the roof deck. There is no requirement for rated roof assembly. Fire caulk around each 2x12? What is the code reference to address the condition?
 
Fire partition extends to underside of roof sheathing. Partition is penetrated by 2x12's holding up the roof deck. There is no requirement for rated roof assembly. Fire caulk around each 2x12? What is the code reference to address the condition?


Define fire partition


Draft stop???

Rated wall??

If rated wall how many hours ?

Why required
 
Define fire partition: A vertical assembly of materials designed to restrict the spread of fire in which openings are protected
Draft stop??? Will also count as a draft stop
Rated wall?? yes
If rated wall how many hours ? 1
Why required: inspector wants
 
Should have asked what occupancy type??


Did Mr. or Mrs. Why required: inspector wants ,,, give a code section for the required one hour wall?
 
Should have asked what occupancy type??


Did Why required: inspector wants ,,, give a code section for the required one hour wall?

lol, its not required...probably the same Mr. or Mrs. requiring a UL test burn of a PEMB (metal building) for certification of that partition.
 
708.7 Penetrations. Penetrations of fire partitions shall comply
with Section 714.

714.3.1.1 Fire-resistance-rated assemblies. Penetrations
shall be installed as tested in an approved fireresistance-
rated assembly.
714.3.1.2 Through-penetration firestop system.
Through penetrations shall be protected by an
approved penetration firestop system installed as tested
in accordance with ASTM E814 or UL 1479, with a
minimum positive pressure differential of 0.01 inch
(2.49 Pa) of water and shall have an F rating of not less
than the required fire-resistance rating of the wall penetrated.

In the future probably easier/ cheaper to terminate it at a rated lid....Or other alternatives...

708.4 Continuity. Fire partitions shall extend from the top of
the foundation or floor/ceiling assembly below to the underside
of the floor or roof sheathing, slab or deck above or to
the fire-resistance-rated floor/ceiling or roof/ceiling assembly
above,
and shall be securely attached thereto. In combustible
construction where the fire partitions are not required to be
continuous to the sheathing, deck or slab, the space between
the ceiling and the sheathing, deck or slab above shall be fireblocked
or draftstopped in accordance with Sections 718.2
and 718.3 at the partition line.
 
708.7 Penetrations. Penetrations of fire partitions shall comply
with Section 714.

714.3.1.1 Fire-resistance-rated assemblies. Penetrations
shall be installed as tested in an approved fireresistance-
rated assembly.
714.3.1.2 Through-penetration firestop system.
Through penetrations shall be protected by an
approved penetration firestop system installed as tested
in accordance with ASTM E814 or UL 1479, with a
minimum positive pressure differential of 0.01 inch
(2.49 Pa) of water and shall have an F rating of not less
than the required fire-resistance rating of the wall penetrated.
.

The issue is we have a solid fireblocking material that is code approved for use as fireblocking. When this fireblock material penetrates a fire partition; beyond filling any slight annular space with a firestop system we have a leap requiring a UL#. The problem is this fire partition aint actually required by code, really does not even require fire blocking consideration due to inherent blocking of a wood framed single story . Now that somebody made the leap to deem this a fire partition they can send the project into code interpretation gymnastics: Like requiring a E814/UL# 1479 for nominal 2x penetrations and watch the poor soul squirm because there is no such bird.

Same thing with that PEMB building solid steel frame penetration with no roof rating required The penetration exceeds the code as a fireblocking material when steel wool sets the bar. Find me a E814/UL# 1479 for solid steel penetration.

Besides nominal wood 2x being a minimuim size code approved fireblock material anything other code reference for solid wood or steel penetrations?

~3/4" glued wood panel is also an acceptable fireblock material...According to Table 722.6.2(1) 4 layers of 19/32" (2-3/8") glued wood will add 1 hr to rating...Can you penetrate a 1hr partition with 2-3/8" glued wood panel member, firestop the annular and call it good?

Need a stick to beat back this nonsense, please.
 
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