1 Hour Fire Rated Roof Overhang

A b 2 feet to 5 feet not fire resistance rated 0 hours 5 feet.

1 hour fire rated roof overhang.

With 1 2 wood structural panels with. 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. 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. This is a system test that includes structural members such as beams trusses and roof deck.

Use flat horizontal soffits see figure 3 instead of attaching the soffits to the sloped joists which creates sloped soffits. Use flat horizontal soffits see figure 3 instead of attaching the soffits to the sloped joists which creates sloped soffits. Wood joists wood i joists floor trusses and flat or pitched roof trusses spaced a maximum 24 o c. Ibc table 721 3 item 21 1 1 describes a single prescriptive 1 hour rated floor or roof assembly that includes wood trusses.

Fire resistance rated 1 hour on the underside. Ul and fm list many roof ceiling systems in their. Time temperature ratings the third major roof system fire test is astm e 119. 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.

Fm calls their acceptable risk systems class 1 while ul calls theirs classified insulated metal deck constructions. 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.