Fire Rated Wood Roof Assembly

Substrate roof floor ceiling time assembly ff file no.

Fire rated wood roof assembly.

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. Wall finishes and their ratings. 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. When they are you get 20 minutes in a wall and 10 minutes with floor and roof joists.

Fire rated wood frame wall and floor ceiling assemblies. 12 x 24 2 x 4 8 w10 x 25 beam floor units and beam support 3 hr. Concrete with cellular steel 3 hr. Fire resistance rated truss assemblies.

The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels. W 1 x 8 wood planking 2 layers 1 2 plywood span 10 live load 40lbs. For additional information on fire resistance rated assemblies see sbca research report 1509 01. 2 x 6 f d joists 16 o c.

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. Helpful documents and resources for usg s roof assemblies can be found on this page. 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. Urb concealed grid system and tile.

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. 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. 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.

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