Fire Rated Roof Ceiling Assemblies

Roof floor ceiling time assembly ff file no.

Fire rated roof ceiling assemblies.

The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels. A question has come up concerning sloped roof trusses and fire assembly ratings. 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. 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 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. 2 x 10 16 o c span 12 14 live load 40lbs w 3 4 wood sheathing ceiling 3 8 gwb. 12 x 24 2 x 4 8 w10 x 25 beam floor units and beam support 3 hr. You can use only the specific type size and minimum.

Ul tests rate an entire assembly. No ceiling or suspension system product alone constitutes a fire rated assembly. 722 6 2 1 fire resistance rating of wood frame assemblies. 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. Roof ceiling and floor ceiling construction assemblies which are tested and assigned hourly ratings mandated by building codes or other building safety requirements. Two types of fire rated construction assemblies pertain to acoustical ceiling systems. Floor ceiling.

Urb concealed grid system and tile. 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. Or to the underside of the fire resistance rated floor ceiling or roof ceiling assembly above. Openings penetrations joints and duct air openings must be protected.

Roof ceiling assemblies helpful documents and resources for usg s roof assemblies can be found on this page. 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 assemblies are tested and certified in their entirety. Concrete with cellular steel 3 hr.

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 ceiling assemblies suspension ceiling designs floor ceiling designs a003 3 hr.