Ul and fm list many roof ceiling systems in their.
1 hour fire rated roof overhang.
Enclose overhangs with soffits that have a minimum 1 hour fire resistance rating to prevent embers and hot gases from making contact with the joists rafters or trusses or the underside of the roof decking.
Overhangs one hour fire resistance rating.
Use flat horizontal soffits see figure 3 instead of attaching the soffits to the sloped joists which creates sloped soffits.
A b 2 feet to 5 feet not fire resistance rated 0 hours 5 feet.
Roof eave fire resistance rating shall be permitted to be reduced to 0 hours on the underside of the.
Enclose overhangs with soffits that have a minimum 1 hour fire resistance rating to prevent embers and hot gases from making contact with the joists rafters or trusses or the underside of the roof decking.
Time temperature ratings the third major roof system fire test is astm e 119.
With 1 2 wood structural panels with.
Fm calls their acceptable risk systems class 1 while ul calls theirs classified insulated metal deck constructions.
Fire resistance rated 1 hour on the underside.
Wood joists wood i joists floor trusses and flat or pitched roof trusses spaced a maximum 24 o c.
This is a system test that includes structural members such as beams trusses and roof deck.
Ibc table 721 3 item 21 1 1 describes a single prescriptive 1 hour rated floor or roof assembly that includes wood trusses.
Everything you wanted to know about fire rated construction but were afraid to ask.
The detail he gave us one coat stucco sub shows 2 layers of type x screwed into the rafter tails 3 5 8 with lath and stucco over that.
Where when and how to determine if you need it.