1 Hour Rated Suspended Ceiling Roof Assembly

Don t be left hanging understanding how the nec regards suspended ceiling designs and supports is critical for proper design and installation of electrical wiring and equipment.

1 hour rated suspended ceiling roof assembly.

For complete information on the listed systems the actual listing or test report should be reviewed. The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels. Roof ceiling and attic separation. 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 o c.

Our range of drawings can help pros plan projects more effectively by utilizing designs for a fire rated ceiling assembly. 1 2 12 7 mm toughrock fireguard c or 1 2 12 7 mm densarmor plus fireguard c gypsum panel applied perpendicular to resilient channels 24 610 mm o c. Prescriptive designs ibc table 721 3 item 21 1 1 describes a single prescriptive 1 hour rated floor or roof assembly that includes wood trusses. I would like to apply the drywall directly to the bottom of the truss and also have insulation for sound control.

12 x 24 2 x 4 8 w10 x 25 beam floor units and beam support 3 hr. Two types of fire rated construction assemblies pertain to acoustical ceiling systems. 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. As a designer and installer you should know the fundamental differences between a suspended ceiling which is an integral part of a fire rated floor ceiling or roof ceiling assembly and the far more.

Floor or roof suspended ceiling system illustration fr system 4 tm ner 392 1991 construction 1 hour rating floor or roof 24 oc min 12 depth 2 layers 1 2 type x gypsum sheathing min 15 32 wh tsc fca 45 02 wh tsc fca 45 04 ga fc5512 nominal 2x3 24 oc min 10 depth truswal metal truss plates 1 layer 5 8 type x gypsum sheathing min 3 4. 3 4 fr 83 12 x 12 z runners fluorescent type none 2 1 2 concrete. 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. Concrete with cellular steel 3 hr.

276 fire rated ceiling assemblies suspension ceiling designs floor ceiling designs a003 3 hr. Ibc section 703 3 item 2. With 1 25 mm type s drywall screws 12 305 mm o c. Since the insulation will retard the transfer of heat any insulation incorporated into a rated assembly.

I am looking for a 1 hour roof ceiling assembly for wood truss construction.