1 Hour Rated Roof

The roof panel construction must have a 1 hour fire rating and shall be non combustible.

1 hour rated roof.

Customer service sales 1 800 950 3839 technical support 1 800 usg 4you product safety hotline 1 800 507 8899. Last 1 hour before ignition. Base layer attached with 1 25 mm type s 12 corrosion resistant bugle head screws 8 203 mm o c. Experience maximum flame spread of 13 feet.

Use flat horizontal soffits see figure 3 instead of attaching the soffits to the sloped joists which creates sloped soffits. Urb concealed grid system and tile. Ibc table 722 6 2 2 allows 10 minutes for wood floor or roof joists at 16 o c. 12 x 24 2 x 4 8 w10 x 25 beam floor units and beam support 3 hr.

These listings are short summaries to serve as a. No minimum joist size is given except that it needs to be adequate for structural loads. Ibc section 722 6 could be used to calculate up to a 1 hour rating for a wood frame wall floor or roof assembly. Concrete with cellular steel 3 hr.

Screw fastened perpendicular to lower chord of wood trusses of 2 x 4 38 mm x 89 mm. 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. 3 4 fr 83 12 x 12 z runners fluorescent type none 2 1 2 concrete. Roofing with a class c rating is able to.

6 usg fire resistant assemblies test certification test conditions and fire and sound tested assemblies listed in this selector are based on characteristics properties and performance certificationof materials and systems obtained under controlled test conditions as set forth in the appropriate astm standard in effect at the time of test. 3 1 2 89 mm corrosion resistant 20 gauge 30 mils steel studs 24 610 mm o c. 276 fire rated ceiling assemblies suspension ceiling designs floor ceiling designs a003 3 hr. A recent building official stated.

Pressure treated shakes and shingles are the most common roofing materials to fall under the class b rating. Two layers 5 8 15 9 mm densglass fireguard sheathing applied vertically to min. In the florida building code 2014 section 1505 1 roof assemblies rated for a fire classification need to be tested to astm e 108 or ul790. A similar section exists for ibc 2015.

Ul p533 roof ceiling one layer 5 8 15 9 mm fire shield c ga rc 2603 wallboard attached to 1 2 12 7 mm resilient furring channel spaced 12 o c. Resist eight cycles of a gas flame turned on and off. Class c roofing provides only light fire protection.