1 Hour Rated Roof

Ibc section 722 6 could be used to calculate up to a 1 hour rating for a wood frame wall floor or roof assembly.

1 hour rated roof.

Customer service sales 1 800 950 3839 technical support 1 800 usg 4you product safety hotline 1 800 507 8899. 12 x 24 2 x 4 8 w10 x 25 beam floor units and beam support 3 hr. Resist eight cycles of a gas flame turned on and off. Roofing with a class c rating is able to.

Face layer attached with 1 5 8 41 mm type s 12 corrosion resistant bugle head screws spaced 8. A similar section exists for ibc 2015. 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. 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.

Pressure treated shakes and shingles are the most common roofing materials to fall under the class b rating. 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. Ibc table 722 6 2 2 allows 10 minutes for wood floor or roof joists at 16 o c. 276 fire rated ceiling assemblies suspension ceiling designs floor ceiling designs a003 3 hr.

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. 3 4 fr 83 12 x 12 z runners fluorescent type none 2 1 2 concrete. Class c roofing provides only light fire protection.

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. Last 1 hour before ignition. Urb concealed grid system and tile. Base layer attached with 1 25 mm type s 12 corrosion resistant bugle head screws 8 203 mm o c.

No minimum joist size is given except that it needs to be adequate for structural loads. Gypsum wallboard roof ceilings wood framing pitched roof truss 11 1 hr. Screw fastened perpendicular to lower chord of wood trusses of 2 x 4 38 mm x 89 mm. 1 hour rating floor or roof 24 oc min 12 depth 2 layers 1 2 type x gypsum sheathing min 15 32 wh tsc fca 45 02 wh tsc fca 45 04 ga fc5512 nominal 2x3 24 oc min 10 depth truswal metal truss plates 1 layer 5 8 type x gypsum sheathing min 3 4 nominal 2x3 24 oc min 10 depth.

A recent building official stated. Concrete with cellular steel 3 hr. Two layers 5 8 15 9 mm densglass fireguard sheathing applied vertically to min.