2 Hour Fire Rated Roof Assembly

Assemblies rated from both sides.

2 hour fire rated roof assembly.

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. Urb concealed grid system and tile. Sheathing on both sides.

Fire resistance ratings time temperature include structural elements and everything above including the roof membrane and its surfacing. 3 mineral wool batts. The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels. 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. 276 fire rated ceiling assemblies suspension ceiling designs floor ceiling designs a003 3 hr. 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. 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.

2 fire rated wood frame wall and floor ceiling assemblies. 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. 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. 2 x 10 rafters 24 o c.

The fire resistance rating of a wood frame assembly is equal to the sum of. W 1 2 plywood span 17 live load 20lbs. Lp flameblock fire rated osb sheathing is a component of the following code compliant fire rated assemblies. Openings in the roof shall not be located within 4 feet 1220 mm of the fire wall.

Concrete with cellular steel 3 hr. 5 8 type x gypsum wallboard h 2 6 type s drywall screws 12 o c. These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies. 2x4 16 o c.

2 hour exterior wall assembly ul design no. 722 6 2 1 fire resistance rating of wood frame assemblies.