Fire Rated Wood Roof Assembly

Substrate roof floor ceiling time assembly ff file no.

Fire rated wood roof assembly.

The fire resistance rating of a wood frame assembly is equal to the sum of. Building code requirements. 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.

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. 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 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. Helpful documents and resources for usg s roof assemblies can be found on this page.

Assemblies include ducts dampers lighting or other fixtures in the tested 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. For additional information on fire resistance rated assemblies see sbca research report 1509 01. Floor assemblies using wood trusses may be approved for exemption if the floor assembly demonstrates equivalent fire performance.

Fire resistance rated truss assemblies. 2 x 6 f d joists 16 o c. 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. See full report for details.

722 6 2 1 fire resistance rating of wood frame 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. 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. Fire rated suspended ceiling wood truss council of america floor or roof fire notes 1.