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Forums» International Building and Residential Codes -- Structural Issues» UL listed 1 hr wall= {brick+stud+sheetrock}?

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UL listed 1 hr wall= {brick+stud+sheetrock}?
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Re: UL listed 1 hr wall= {brick+stud+sheetrock}? By  Frank Castelvecchi

Posts: 0

11/16/2006 5:17:00 AM

brick veneer can greatly contribute to exterior wall fire resistance rating.

See 2003 IBC Table 721.4.1(1) gives 2.3 inches equivalent thickness for a 1 hr rating for hollow brick.

If more than 5 ft separation, see 721.6.2.3


Re: UL listed 1 hr wall= {brick+stud+sheetrock}? By  engineerguy

Posts: 0

11/16/2006 7:50:00 AM

Good luck - I''ve had more trouble trying to track down firewall types that stray outside the norm...(doesn''t mean it doesn''t work though..)


Re: UL listed 1 hr wall= {brick+stud+sheetrock}? By  Paul Sweet

Posts: 0

11/16/2006 8:50:00 AM

Real brick veneer contributes to a fire rating. I doubt that the thin (1/2" or so) veneer brick that is applied like tile contributes anything.

UL or the Gypsum Association Fire Resistance Manual have 1 hour rated assemblies. Gypsum board manufacturers might have references to the UL assembly. Once you have the number (U300 series) you can look it up on the UL Online Certification Directory: http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/gothernbr.html


Re: UL listed 1 hr wall= {brick+stud+sheetrock}? By  jeremy

Posts: 0

11/16/2006 1:53:00 PM

There is an ICBO legacy report (ER-5058) which gives a 1-hour rating for what you just decribed. It may be what your architect is thinking of.



Re: UL listed 1 hr wall= {brick+stud+sheetrock}? By  PUNKROCK

Posts: 0

11/17/2006 5:40:00 PM

Thanks, Jeremy

That report is great, and had me agreeing with it until I noticed it was for NONBEARING WALLS, my situation is for EXTERIOR BEARING WALLS.


Re: UL listed 1 hr wall= {brick+stud+sheetrock}? By  habeason

Posts: 0

11/18/2006 1:37:00 AM


UL U305 one hour - if you need fire exposure from both sides.
UL U356 one hour - Fire exposure from one side only.

UL U302 -2 hour with brick exterior.
If you look in Chapter 7 of 2003 IBC there is a prescriptive method for calculating fire resistance of a wall assembly.

These should do it for you.


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