2 Hour Fire Rated Roof Assembly

V337 2 hour interior wall assembly ul design no.

2 hour fire rated roof assembly.

2 fire rated wood frame wall and floor ceiling assemblies. The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels. 2x4 16 o c. Usg provides resources here for our ul wall assemblies for seamless integration into any construction project.

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. 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. Openings in the roof shall not be located within 4 feet 1220 mm of the fire wall. Table 1 one hour fire rated loadbearing wood frame wall assemblies.

W 1 2 plywood span 17 live load 20lbs. 2 x 10 rafters 24 o c. Assemblies rated from both sides. 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. 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. 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. 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. Concrete with cellular steel 3 hr. Lp flameblock fire rated osb sheathing is a component of the following code compliant fire rated assemblies. 3 mineral wool batts.

722 6 2 1 fire resistance rating of wood frame assemblies. 3 4 fr 83 12 x 12 z runners fluorescent type none 2 1 2 concrete. 276 fire rated ceiling assemblies suspension ceiling designs floor ceiling designs a003 3 hr. Urb concealed grid system and tile.

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. 2 hour exterior wall assembly ul design no.