Fire Rated Roof Ceiling Assemblies

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

Fire rated roof ceiling assemblies.

Concrete with cellular steel 3 hr. 722 6 2 1 fire resistance rating of wood frame assemblies. Openings penetrations joints and duct air openings must be protected. You can use only the specific type size and minimum.

The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels. Roof floor ceiling time assembly ff file no. Do you have any information regarding the suitability of the fire rated ceiling assemblies for sloped roof trusses. Or to the underside of the fire resistance rated floor ceiling or roof ceiling assembly above.

2 x 10 16 o c span 12 14 live load 40lbs w 3 4 wood sheathing ceiling 3 8 gwb. Roof ceiling and floor ceiling construction assemblies which are tested and assigned hourly ratings mandated by building codes or other building safety requirements. Fire rated ceiling assemblies suspension ceiling designs floor ceiling designs a003 3 hr. No ceiling or suspension system product alone constitutes a fire rated assembly.

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. 3 4 fr 83 12 x 12 z runners fluorescent type none 2 1 2 concrete. Urb concealed grid system and tile. A question has come up concerning sloped roof trusses and fire assembly ratings.

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. Floor ceiling. 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. 2 x 8 16 o c span 12 live load 40 lbs w 3 4 t g plywood ceiling 1 2 non rated gwb.

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. 12 x 24 2 x 4 8 w10 x 25 beam floor units and beam support 3 hr. Roof ceiling assemblies helpful documents and resources for usg s roof assemblies can be found on this page.

Some are reluctant to rely on test results from flat parallel chord trusses applied to sloped roof trusses. Fire rated assemblies are tested and certified in their entirety.