2 Hour Fire Rated Roof Assembly

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 hour fire rated roof assembly.

Openings in the roof shall not be located within 4 feet 1220 mm of the fire wall. Substrate roof floor ceiling time assembly ff file no. 12 x 24 2 x 4 8 w10 x 25 beam floor units and beam support 3 hr. 2 hour exterior wall assembly ul design no.

Lp flameblock fire rated osb sheathing is a component of the following code compliant fire rated assemblies. 276 fire rated ceiling assemblies suspension ceiling designs floor ceiling designs a003 3 hr. 3 4 fr 83 12 x 12 z runners fluorescent type none 2 1 2 concrete. The fire resistance rating of a wood frame assembly is equal to the sum of.

2 fire rated wood frame wall and floor ceiling assemblies. Assemblies rated from both sides. The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels. 722 6 2 1 fire resistance rating of wood frame assemblies.

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. Fire safety caution passing a fire test in a controlled laboratory setting and or certifying or labeling a product as having a one hour two hour or any other fire resistance or protection rating and therefore as acceptable for use in certain fire rated assemblies systems does not mean that either a particular assembly system. 2 x 10 rafters 24 o c. Concrete with cellular steel 3 hr.

V337 2 hour interior wall assembly ul design no. These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall 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. Usg provides resources here for our ul wall assemblies for seamless integration into any construction project.

Sheathing on both sides. 5 8 type x gypsum wallboard h 2 6 type s drywall screws 12 o c. Urb concealed grid system and tile. W 1 2 plywood span 17 live load 20lbs.

2x4 16 o c. Fire resistance ratings time temperature include structural elements and everything above including the roof membrane and its surfacing.