Fire Rated Roof Ceiling Assemblies

The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels.

Fire rated roof ceiling assemblies.

Fire rated ceiling assemblies suspension ceiling designs floor ceiling designs a003 3 hr. Roof floor ceiling time assembly ff file no. 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. 3 4 fr 83 12 x 12 z runners fluorescent type none 2 1 2 concrete.

Roof ceiling and floor ceiling construction assemblies which are tested and assigned hourly ratings mandated by building codes or other building safety requirements. The fire resistance rating of a wood frame assembly is equal to the sum of. 2 x 10 16 o c span 12 14 live load 40lbs w 3 4 wood sheathing ceiling 3 8 gwb. Fire rated assemblies are tested and certified in their entirety.

A question has come up concerning sloped roof trusses and fire assembly ratings. Or to the underside of the fire resistance rated floor ceiling or roof ceiling assembly above. 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. Openings penetrations joints and duct air openings must be protected.

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. Some are reluctant to rely on test results from flat parallel chord trusses applied to sloped roof trusses. 12 x 24 2 x 4 8 w10 x 25 beam floor units and beam support 3 hr. Two types of fire rated construction assemblies pertain to acoustical ceiling systems.

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

722 6 2 1 fire resistance rating of wood frame assemblies. Concrete with cellular steel 3 hr. Urb concealed grid system and tile. You can use only the specific type size and minimum.

Floor ceiling. Ul tests rate an entire assembly.