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Roof Construction - 1 hour fire rating[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: seaoc(--nospam--at)seaoc.org
- Subject: Roof Construction - 1 hour fire rating
- From: rlewis(--nospam--at)techteam.org (Richard Lewis)
- Date: 06 May 1998 22:15:41 GMT
I am designing a Type II construction building under SBCCI building code. Type II construction in SBCCI is non-combustible for all the UBC designers. The roof of the building is hipped with a 4:12 pitch and about a 64 feet span. The framing will be steel bar joists clear spanning between the exterior walls. To create the slope the bar joists will have a stepped top chord, like a wood truss roof. My question has to do with fire rating. I need a 1 hour rated roof assembly. Can anybody answer the following: 1. The UL Directory shows flat roof in their diagrams. Can I use the UL systems on a sloping top chord and horizontal bottom chord/ceiling roof assembly? Is there anything special that has to be done to the system to use it on a sloped roof? 2. The roof assembly must be non-combustible. Ideally I would like to use asphalt shingles. Is there a roof construction assembly which allows asphalt shingles? I donÕt want to use fire retardant treated plywood. Is there a way to get combustible plywood in the system? Am I stuck with metal roofing? Thanks for your help. __________________________________________________ Richard Lewis, P.E. Missionary TECH Team rlewis(--nospam--at)techteam.org The service mission like-minded Christian organizations may turn to for technical assistance and know-how.
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