2 Hour Fire Rated Roof Assembly

3 mineral wool batts.

2 hour fire rated roof assembly.

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. 2 fire rated wood frame wall and floor ceiling assemblies. Lp flameblock fire rated osb sheathing is a component of the following code compliant fire rated assemblies. 2x4 16 o c.

276 fire rated ceiling assemblies suspension ceiling designs floor ceiling designs a003 3 hr. 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. 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. 722 6 2 1 fire resistance rating of wood frame assemblies.

Substrate roof floor ceiling time assembly ff file no. Sheathing on both sides. Concrete with cellular steel 3 hr. Usg provides resources here for our ul wall assemblies for seamless integration into any construction project.

V337 2 hour interior wall assembly ul design no. The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels. These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies. Urb concealed grid system and tile.

The fire resistance rating of a wood frame assembly is equal to the sum of. W 1 2 plywood span 17 live load 20lbs. 5 8 type x gypsum wallboard h 2 6 type s drywall screws 12 o c. 2 hour exterior wall assembly ul design no.

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. Fire resistance ratings time temperature include structural elements and everything above including the roof membrane and its surfacing. 12 x 24 2 x 4 8 w10 x 25 beam floor units and beam support 3 hr. Openings in the roof shall not be located within 4 feet 1220 mm of the fire wall.

Assemblies rated from both sides. Table 1 one hour fire rated loadbearing wood frame wall assemblies.