Fire Rated Wood Roof Assembly

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.

Fire rated wood roof assembly. 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. Concrete with cellular steel 3 hr. 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.

Your wood framing members are required to be not more than 16 on center. 276 fire rated ceiling assemblies suspension ceiling designs floor ceiling designs a003 3 hr. W 1 x 8 wood planking 2 layers 1 2 plywood span 10 live load 40lbs. Helpful documents and resources for usg s roof assemblies can be found on this page.

The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels. When they are you get 20 minutes in a wall and 10 minutes with floor and roof joists. 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. 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.

For additional information on fire resistance rated assemblies see sbca research report 1509 01. 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. 12 x 24 2 x 4 8 w10 x 25 beam floor units and beam support 3 hr. 3 4 fr 83 12 x 12 z runners fluorescent type none 2 1 2 concrete.

Fire resistance rated truss assemblies. Wall finishes and their ratings. Where the room side fire resistance rated membrane of the corridor is carried through to the underside of the floor or. 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.

Fire rated wood frame wall and floor ceiling assemblies. 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.