1 Hour Fire Rated Roof Overhang

Use flat horizontal soffits see figure 3 instead of attaching the soffits to the sloped joists which creates sloped soffits.

1 hour fire rated roof overhang.

This is a system test that includes structural members such as beams trusses and roof deck. Everything you wanted to know about fire rated construction but were afraid to ask. Roof eave fire resistance rating shall be permitted to be reduced to 0 hours on the underside of the. Where when and how to determine if you need it.

He was told that the walls would need to have a fire resistive construction and also the eave overhang would need to be rated 1 hour as well because it encroaches into the setback. Use flat horizontal soffits see figure 3 instead of attaching the soffits to the sloped joists which creates sloped soffits. With 1 2 wood structural panels with. 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.

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. Overhangs one hour fire resistance rating. 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. Ibc table 721 3 item 21 1 1 describes a single prescriptive 1 hour rated floor or roof assembly that includes wood trusses. Ul and fm list many roof ceiling systems in their. 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.