Fire Rated Roof Ceiling Assemblies

Openings penetrations joints and duct air openings must be protected.

Fire rated roof ceiling assemblies.

Concrete with cellular steel 3 hr. Some are reluctant to rely on test results from flat parallel chord trusses applied to sloped roof trusses. 2 x 10 16 o c span 12 14 live load 40lbs w 3 4 wood sheathing ceiling 3 8 gwb. Or to the underside of the fire resistance rated floor ceiling or roof ceiling assembly above.

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. 722 6 2 1 fire resistance rating of wood frame assemblies. 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 fire resistance rating of a wood frame assembly is equal to the sum of. Fire rated assemblies are tested and certified in their entirety. Urb concealed grid system and tile. 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. Floor ceiling. Fire rated ceiling assemblies suspension ceiling designs floor ceiling designs a003 3 hr. Two types of fire rated construction assemblies pertain to acoustical ceiling systems.

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. You can use only the specific type size and minimum. Roof floor ceiling time assembly ff file no. 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.

No ceiling or suspension system product alone constitutes a fire rated assembly. 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. The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels. 12 x 24 2 x 4 8 w10 x 25 beam floor units and beam support 3 hr.

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