2 Hour Fire Rated Roof Assembly

2 fire rated wood frame wall and floor ceiling assemblies.

2 hour fire rated roof assembly.

Concrete with cellular steel 3 hr. 5 8 type x gypsum wallboard h 2 6 type s drywall screws 12 o c. Fire resistance ratings time temperature include structural elements and everything above including the roof membrane and its surfacing. This section contains procedures for calculating the fire resistance ratings of walls floor ceiling and roof ceiling assemblies based in part on the standard method of testing referenced in section 703 2.

Lp flameblock fire rated osb sheathing is a component of the following code compliant fire rated assemblies. Table 1 one hour fire rated loadbearing wood frame wall assemblies. V337 2 hour interior wall assembly ul design no. 3 4 fr 83 12 x 12 z runners fluorescent type none 2 1 2 concrete.

The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels. 3 mineral wool batts. Assemblies rated from both sides. 2 hour exterior wall assembly ul design no.

276 fire rated ceiling assemblies suspension ceiling designs floor ceiling designs a003 3 hr. 722 6 2 1 fire resistance rating of wood frame assemblies. A one hour rating would mean the structural elements have not yet reached their yield point when exposed to a under deck heat load defined in astm e119 for steel structural members as reaching 1 070 degrees f. 2x4 16 o c.

The lower roof assembly within 4 feet 1220 mm of the wall has not less than a 1 hour fire resistance rating and the entire length and span of supporting elements for the rated roof assembly has a fire resistance rating of not less than 1 hour. The fire resistance rating of a wood frame assembly is equal to the sum of. Usg provides resources here for our ul wall assemblies for seamless integration into any construction project. 12 x 24 2 x 4 8 w10 x 25 beam floor units and beam support 3 hr.

Sheathing on both sides. 2 x 10 rafters 24 o c. Openings in the roof shall not be located within 4 feet 1220 mm of the fire wall. Urb concealed grid system and tile.

Substrate roof floor ceiling time assembly ff file no. Elements of buildings the fire resistance rating classifies the ability of an assembly to confine and isolate fire within a zone comprised of fire resistance rated walls ceiling and floor assemblies.