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.

Your wood framing members are required to be not more than 16 on center. The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels. 276 fire rated ceiling assemblies suspension ceiling designs floor ceiling designs a003 3 hr. Fire resistance rated truss assemblies.

Urb concealed grid system and tile. Helpful documents and resources for usg s roof assemblies can be found on this page. 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 rated wood frame wall and floor ceiling assemblies.

Wall finishes and their ratings. Fire protection rating is calculated from the flame side of the assembly and of course some assemblies have multiple flame sides. 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. 12 x 24 2 x 4 8 w10 x 25 beam floor units and beam support 3 hr.

2 x 6 f d joists 16 o c. For additional information on fire resistance rated assemblies see sbca research report 1509 01. Where the room side fire resistance rated membrane of the corridor is carried through to the underside of the floor or. Substrate roof floor ceiling time assembly ff file 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. 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. Concrete with cellular steel 3 hr. When they are you get 20 minutes in a wall and 10 minutes with floor and roof joists.

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. 3 4 fr 83 12 x 12 z runners fluorescent type none 2 1 2 concrete.