2 Hour Fire Rated Roof Assembly

The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels.

2 hour fire rated roof assembly.

2x4 16 o c. 2 fire rated wood frame wall and floor ceiling assemblies. Openings in the roof shall not be located within 4 feet 1220 mm of the fire wall. Lp flameblock fire rated osb sheathing is a component of the following code compliant fire rated assemblies.

2 x 10 rafters 24 o c. W 1 2 plywood span 17 live load 20lbs. The fire resistance rating of a wood frame assembly is equal to the sum of. 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.

V337 2 hour interior wall assembly ul design no. Substrate roof floor ceiling time assembly ff file no. 276 fire rated ceiling assemblies suspension ceiling designs floor ceiling designs a003 3 hr. Urb concealed grid system and tile.

2 hour exterior wall assembly ul design no. 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. 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. 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.

12 x 24 2 x 4 8 w10 x 25 beam floor units and beam support 3 hr. Fire resistance ratings time temperature include structural elements and everything above including the roof membrane and its surfacing. 722 6 2 1 fire resistance rating of wood frame assemblies. 3 mineral wool batts.

Assemblies rated from both sides. These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies. Sheathing on both sides. 5 8 type x gypsum wallboard h 2 6 type s drywall screws 12 o c.

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. Table 1 one hour fire rated loadbearing wood frame wall assemblies.