Fire Rated Wood Roof Assembly

Assemblies include ducts dampers lighting or other fixtures in the tested assembly.

Fire rated wood roof assembly.

Fire rated wood frame wall and floor ceiling assemblies. Floor assemblies using wood trusses may be approved for exemption if the floor assembly demonstrates equivalent fire performance. 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. Fire resistance rated truss assemblies.

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. See full report for details. Therefore in order to apply this exemption to floor trusses the trusses must be tested and evaluated for equivalency to the fire performance of nominal 2 x 10 lumber.

The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels. 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 suspended ceiling wood truss council of america floor or roof fire notes 1. Substrate roof floor ceiling time assembly ff file no.

722 6 2 1 fire resistance rating of wood frame assemblies. 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. 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.

Where the room side fire resistance rated membrane of the corridor is carried through to the underside of the floor or. 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. For additional information on fire resistance rated assemblies see sbca research report 1509 01. 2 x 6 f d joists 16 o c.