Roof Cieling Fire Rating

As explained there these ratings are applied to certain types of roof ceiling and floor ceiling construction assemblies which are tested and assigned hourly ratings mandated by building codes or other building safety requirements.

Roof cieling fire rating. Rating also applies with 5 8 15 9 mm fire shield c kal kore plaster base. Helpful documents and resources for usg s roof assemblies can be found on this page. However the total depth of the systems with either directly attached or suspended ceiling membranes shall be permitted to extend greater than 36 inches. Our roof systems are rated by code for external fire resistance under deck exposure and time temperature resistance.

Rating of partitions floor ceiling assemblies roof ceiling assemblies beams and columns. 15 9 mm t g plywood floor sheathing. Where the room side fire resistance rated membrane of the corridor is carried through to the underside of the floor or roof sheathing deck or slab of a fire resistance rated floor or roof above the ceiling of the corridor shall be permitted to be protected by the use of ceiling materials as required for a 1 hour fire resistance rated floor or roof system. Ul p533 roof ceiling one layer 5 8 15 9 mm fire shield c ga rc 2603 wallboard attached to 1 2 12 7 mm resilient furring.

We must emphasize however that individual roof components are not rated at all. As applied to 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. Fire resistance ratings represent the results of tests on assemblies made up of specific materials in a specific configuration. Roofing systems are rated by realistic fire tests.

Gypsum wallboard roof ceilings wood framing pitched roof truss 11 1 hr. Floor ceiling and roof ceiling systems were fire tested at less than 36 inches total depth. 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 slope of the test specimen is preselected and since steeper slopes are more of a challenge due to melting material feeding the fire the rating applies to the maximum slope passed.

If you are unfamiliar with ul fire resistance ratings begin with a review of meeting code requirements pg. 3 4 fr 83 12 x 12 z runners fluorescent type none 2 1 2 concrete. 12 x 24 2 x 4 8 w10 x 25 beam floor units and beam support 3 hr. The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels.

Urb concealed grid system and tile. Both ul and ga include specific guidance regarding the use of insulation in assemblies. Fire tests may be conducted at any one of several recognized facilities.