Roof Ceiling Fire Rating

Urb concealed grid system and tile.

Roof ceiling fire rating.

Concrete with cellular steel 3 hr. 722 6 2 1 fire resistance rating of wood frame assemblies. You can use only the specific type size and. 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. 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. The fire resistance rating of a wood frame assembly is equal to the sum of.

5 8 15 9 mm toughrock fireguard c gypsum board or 5 8 densarmor plus fireguard c gypsum panels applied perpendicular to resilient channels 24 o c. No ceiling or suspension system product alone constitutes a fire rated assembly. The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels. Ul tests rate an entire assembly.

3 4 fr 83 12 x 12 z runners fluorescent type none 2 1 2 concrete. 610 mm with 1 25 4 mm type s drywall screws 12 305 mm o c. Gypsum panel end joints located midway between continuous channels and attached to additional pieces of channels 54 1372 mm long with screws 12 305 mm. Ul and fm list many roof ceiling systems in their publications.

Time temperature ratings the third major roof system fire test is astm e 119. 276 fire rated ceiling assemblies suspension ceiling designs floor ceiling designs a003 3 hr. In the world trade tower collapse heat load on the connections of steel trusses is suspect. This is a system test that includes structural members such as beams trusses and roof deck.

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. 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 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. Fire resistance ratings time temperature include structural elements and everything above including the roof membrane and its surfacing.