1 Hour Roof Truss Assembly

Truss depth shall be 5 1 4 with a min.

1 hour roof truss assembly.

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. Layer 3 trusses. 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. Wood truss council of america floor or roof fire notes 1.

Pitched or parallel chord wood trusses spaced 24 max. Roof slope of 3 12. Screw fastened perpendicular to lower chord of wood trusses of 2 x 4 38 mm x 89 mm. Figure 17 3 2 figure 17 3 2.

Ibctable 721 3 item 21 1 1 describes a single prescriptive 1 hour rated floor or roof assembly that includes wood trusses. O c fabricated from nom. Wood joists wood i joists floor trusses and flat or pitched roof trusses spaced a maximum 24 o c. 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.

Fire safety building assembly s the period of time the assembly will serve as a barrier to the spread. With 1 25 mm type s drywall screws 12 305 mm o c. 2x4 lumber oriented vertically or horizontally. I would like to apply the drywall directly to the bottom of the truss and also have insulation for sound control.

C roof ceilings45 51 steel framed including steel bar joist framing steel c joist framing steel truss and. Ibc section 722 6 could be used to calculate up to a 1 hour rating for a wood frame wall floor or roof assembly. One hour roof ceiling assembly. Is this possible without using channels and what ul number would i use.

See full report for details. Engineered joist and truss. 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. Resilient channels attached 16 406 mm o c.

Ibc table 722 6 2 2 allows 10 minutes for wood floor or roof joists at 16 o c. 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. Gypsum wallboard roof ceilings wood framing pitched roof truss 11 1 hr. 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.

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. Maximum with 1 5 8 41 mm type s drywall screws 8 203 mm o c. Assemblies include ducts dampers lighting or other fixtures in the tested assembly. No minimum joist size is given except that it needs to be adequate for structural loads.

Through base layer perpendicular to.