Fire Rated Roof Ceiling Assemblies

Roof ceiling assemblies helpful documents and resources for usg s roof assemblies can be found on this page.

Fire rated roof ceiling assemblies.

Fire rated assemblies are tested and certified in their entirety. Roof ceiling assemblies ceiling system lighting hvac outlets and other penetrants through the ceiling the plenum roof support structure and roof assembly including deck insulation and roofing system. Or to the underside of the fire resistance rated floor ceiling or roof ceiling assembly above. Floor ceiling.

No ceiling or suspension system product alone constitutes a fire rated assembly. 2 x 8 16 o c span 12 live load 40 lbs w 3 4 t g plywood ceiling 1 2 non rated gwb. Fire rated ceiling assemblies suspension ceiling designs floor ceiling designs a003 3 hr. 3 4 fr 83 12 x 12 z runners fluorescent type none 2 1 2 concrete.

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. Openings penetrations joints and duct air openings must be protected. Roof ceiling and floor ceiling construction assemblies which are tested and assigned hourly ratings mandated by building codes or other building safety requirements. Ul tests rate an entire assembly.

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. 722 6 2 1 fire resistance rating of wood frame assemblies. 12 x 24 2 x 4 8 w10 x 25 beam floor units and beam support 3 hr. Some are reluctant to rely on test results from flat parallel chord trusses applied to sloped roof trusses.

The fire resistance rating of a wood frame assembly is equal to the sum of. 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 floor ceiling time assembly ff file no. You can use only the specific type size and minimum.

A question has come up concerning sloped roof trusses and fire assembly ratings. The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels. 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. Do you have any information regarding the suitability of the fire rated ceiling assemblies for sloped roof trusses.

The ibc defines fire barriers as a fire resistance rated wall assembly of materials designed to restrict the spread of fire in which continuity is maintained. Two types of fire rated construction assemblies pertain to acoustical ceiling systems.