1 Hour Roof Truss Assembly

Screw fastened perpendicular to lower chord of wood trusses of 2 x 4 38 mm x 89 mm.

1 hour roof truss assembly.

Roof slope of 3 12. Assemblies include ducts dampers lighting or other fixtures in the tested assembly. Truss depth shall be 5 1 4 with a min. With 1 25 mm type s drywall screws 12 305 mm o c.

Resilient channels attached 16 406 mm o c. See full report for details. 5 8 15 9 mm toughrock fireguard c gypsum board or 5 8 15 9 mm densarmor plus fireguard c gypsum panels applied perpendicular to i shaped wood joists or wood and steel trusses spaced 19 2 488 mm o c. Ibc section 722 6 could be used to calculate up to a 1 hour rating for a wood frame wall floor or roof assembly.

Maximum with 1 5 8 41 mm type s drywall screws 8 203 mm o c. Engineered joist and truss. Ibc table 722 6 2 2 allows 10 minutes for wood floor or roof joists at 16 o c. Pitched or parallel chord wood trusses spaced 24 max.

Wood truss council of america floor or roof fire notes 1. Fire safety building assembly s the period of time the assembly will serve as a barrier to the spread. I am looking for a 1 hour roof ceiling assembly for wood truss construction. Layer 3 trusses.

Figure 17 3 2 figure 17 3 2. In this case a single layer of 1 2 gypsum wallboard is attached to the side of a single roof truss in the location shown to provide the required draftstop and area separation. 1 one hour and two hour rated assemblies that may be used in the roof cavity and that may be constructed with gable end frames. I would like to apply the drywall directly to the bottom of the truss and also have insulation for sound control.

Ul p533 roof ceiling one layer 5 8 15 9 mm fire shield c ga rc 2603 wallboard attached to 1 2 12 7 mm resilient furring channel spaced 12 o c. Through base layer perpendicular to. Ibctable 721 3 item 21 1 1 describes a single prescriptive 1 hour rated floor or roof assembly that includes wood trusses. 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.

Wood joists wood i joists floor trusses and flat or pitched roof trusses spaced a maximum 24 o c. 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. Is this possible without using channels and what ul number would i use. O c fabricated from nom.

Figure 17 3 2 shows an alternative roof detail to that in figure 17 3 1 in which the roof trusses are parallel to the wall assembly. Gypsum wallboard roof ceilings wood framing pitched roof truss 11 1 hr. One hour roof ceiling assembly. With 1 2 wood structural panels with exterior glue applied at right angles to top of joist or top chord of trusses with 8d nails.

No minimum joist size is given except that it needs to be adequate for structural loads.