Roof Ceiling Fire Rated Assemblies

Concrete with cellular steel 3 hr.

Roof ceiling fire rated assemblies.

The reduction can also apply when code allows for a corridor wall to be a 30 minute 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. 276 fire rated ceiling assemblies suspension ceiling designs floor ceiling designs a003 3 hr. Floor ceiling.

Fire partitions must extend from the top of the floor below to the underside of the floor or roof sheathing or to the underside of the fire resistance rated floor ceiling or roof ceiling assembly above. 722 6 2 1 fire resistance rating of wood frame assemblies. 2 x 10 16 o c span 12 14 live load 40lbs w 3 4 wood sheathing ceiling 3 8 gwb. Benefits of fire guard ceilings and grid.

Only fire guard products can be used in fire rated assemblies and are idenfified with the fire guard icon. Meet astm e1264 class a rating. 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. The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels.

Have a question about assemblies. 12 x 24 2 x 4 8 w10 x 25 beam floor units and beam support 3 hr. 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. If you are unfamiliar with ul fire resistance ratings begin with a review of meeting code requirements pg.

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. 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. 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. 3 4 fr 83 12 x 12 z runners fluorescent type none 2 1 2 concrete.

These assemblies need to meet fire and smoke safety and environmental sustainability requirements. Urb concealed grid system and tile. Helpful documents and resources for usg s roof assemblies can be found on this page.