1 Hour Rated Suspended Ceiling Roof Assembly

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.

1 hour rated suspended ceiling roof assembly. 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. Two types of fire rated construction assemblies pertain to acoustical ceiling systems. Face layer attached with 1 5 8 41 mm type s 12 corrosion resistant bugle head screws spaced 8. 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.

Concrete with cellular steel 3 hr. 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. Our range of drawings can help pros plan projects more effectively by utilizing designs for a fire rated ceiling assembly.

Table 1 for one hour rated wall assemblies and table 2 for two hour rated wall assemblies. American softwood lumber standard ps 20. Descriptions of successfully tested i joist floor as. The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels.

Two layers 5 8 15 9 mm densglass fireguard sheathing applied vertically to min. 12 x 24 2 x 4 8 w10 x 25 beam floor units and beam support 3 hr. Base layer attached with 1 25 mm type s 12 corrosion resistant bugle head screws 8 203 mm o c. 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.

3 1 2 89 mm corrosion resistant 20 gauge 30 mils steel studs 24 610 mm o c. Ibc section 703 3 item 2. 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. Lumber shall be identified by the grade mark of a lumber grading or inspection agency that has been approved by an accreditation body that complies with the.

Roof ceiling and attic separation. Here you can find drawings for our ul fire rated floor assemblies and ul fire rated ceiling assemblies.