Roof Ceiling Fire Rated Assemblies

Helpful documents and resources for usg s roof assemblies can be found on this page.

Roof ceiling fire rated assemblies.

Concrete with cellular steel 3 hr. 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. 2 x 8 16 o c span 12 live load 40 lbs w 3 4 t g plywood ceiling 1 2 non rated gwb. 12 x 24 2 x 4 8 w10 x 25 beam floor units and beam support 3 hr.

2 x 10 16 o c span 12 14 live load 40lbs w 3 4 wood sheathing ceiling 3 8 gwb. Have a question about assemblies. Fire guard ceilings and grid systems are designed to provide enhanced resistance against structural failure. 3 4 fr 83 12 x 12 z runners fluorescent type none 2 1 2 concrete.

The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels. Only fire guard products can be used in fire rated assemblies and are idenfified with the fire guard icon. Floor ceiling. 276 fire rated ceiling assemblies suspension ceiling designs floor ceiling designs a003 3 hr.

If you are unfamiliar with ul fire resistance ratings begin with a review of meeting code requirements pg. Meet astm e1264 class a rating. The fire resistance rating of a wood frame assembly is equal to the sum of the time assigned to the membrane on the fire exposed side the time assigned to the framing members and the time assigned for additional contribution by other protective measures such as insulation. 722 6 2 1 fire resistance rating of wood frame assemblies.

Roof floor ceiling time assembly ff file no. 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. 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 reduction can also apply when code allows for a corridor wall to be a 30 minute assembly.

Benefits of fire guard ceilings and grid. Overview fire rated wall floor and ceiling assemblies provide the necessary fire and smoke barriers to create compartmentalization during a fire safeguarding against the spread of fire and smoke within a building or to and from a building. 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.