1 Hour Rated Roof Assembly Residential

I would like to apply the drywall directly to the bottom of the truss and also have insulation for sound control.

1 hour rated roof assembly residential.

A minimum 1 hour fire resistance rating to prevent embers and hot gases from making contact with the joists rafters or trusses or the underside of the roof decking. Assembly rated class a roof coverings are those that meet class a standards when combined with other elements. 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. With 1 25 mm type s drywall screws 12 305 mm o c.

Type x gypsum wallboard applied vertically fastened with 1 7 8 in. Rated from one side and from both sides. Face layer 5 8 in. Thick x 4 ft.

Is this possible without using channels and what ul number would i use. Usg provides resources here for our ul wall assemblies for seamless integration into any construction project. No minimum joist size is given except that it needs to be adequate for structural loads. Assembly rating 1 hr max loading 1684 lbs.

Ibc section 722 6 could be used to calculate up to a 1 hour rating for a wood frame wall floor or roof assembly. Ul does not appear to list an assembly as described. Ibc table 722 6 2 2 allows 10 minutes for wood floor or roof joists at 16 o c. I am looking for a 1 hour roof ceiling assembly for wood truss construction.

2 hour exterior wall assembly ul design no. Joint tape and compound vinyl or casein dry or premixed joint compound applied to face. 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. Long cup head drywall nails 8 in.

Use flat horizontal soffits see figure 3 instead of attaching the soffits to the sloped joists which creates sloped soffits. 1 hour exterior wall assembly ul design no. These listings are short summaries to serve as a. Lp flameblock fire rated osb sheathing is a component of the following code compliant fire rated assemblies.

For example shake roofing with a fire retardant treatment rates class b on its own but achieves a class a rating when combined with specified underlying materials such as type 72 roll roofing material. In fact there is no.