Fire Rated Wood Roof Assembly

Where the room side fire resistance rated membrane of the corridor is carried through to the underside of the floor or.

Fire rated wood roof assembly.

For occupancies such as stores apartments of fices and other commercial and industrial uses build ing codes commonly require floor ceiling and wall assemblies to be fire resistance rated in accordance with standard fire tests. The ratings of these assemblies are determined in accordance with the american society of testing materials standard methods for fire tests of building construction and ma. W 1 x 8 wood planking 2 layers 1 2 plywood span 10 live load 40lbs. The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels.

Fire rated wood frame wall and floor ceiling assemblies. Refer to our roof ceiling assembly documents which includes ul fire rated roof assemblies for easy guidance through the assembly of a roof or ceiling on your next project. 12 x 24 2 x 4 8 w10 x 25 beam floor units and beam support 3 hr. Your wood framing members are required to be not more than 16 on center.

Fire resistance rated truss assemblies. Concrete with cellular steel 3 hr. Roof sheathing slab or deck above or to the fire resistance rated floor ceiling or roof ceiling assembly above and shall be securely attached thereto. Fire protection rating is calculated from the flame side of the assembly and of course some assemblies have multiple flame sides.

2 x 6 f d joists 16 o c. 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. When they are you get 20 minutes in a wall and 10 minutes with floor and roof joists. Helpful documents and resources for usg s roof assemblies can be found on this page.

Substrate roof floor ceiling time assembly ff file no. The reluctance to rely on approved test results is unwarranted as explained in section 17a and section 17b of sbca s metal plate connected wood truss handbook. Wall finishes and their ratings. For additional information on fire resistance rated assemblies see sbca research report 1509 01.

276 fire rated ceiling assemblies suspension ceiling designs floor ceiling designs a003 3 hr. Fire resistance rated truss assemblies a fire resistance rating may be mandated by code for some of the assemblies where metal plate connected wood trusses are used.