No minimum joist size is given except that it needs to be adequate for structural loads.
1 hour roof truss assembly.
Wood truss council of america floor or roof fire notes 1.
Pitched or parallel chord wood trusses spaced 24 max.
Through base layer perpendicular to.
Roof slope of 3 12.
Fire safety building assembly s the period of time the assembly will serve as a barrier to the spread.
Layer 3 trusses.
Hr hour ht height insul insulating or insulation int interior lamin.
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.
Truss depth shall be 5 1 4 with a min.
I am looking for a 1 hour roof ceiling assembly for wood truss construction.
Ibc section 722 6 could be used to calculate up to a 1 hour rating for a wood frame wall floor or roof assembly.
Screw fastened perpendicular to lower chord of wood trusses of 2 x 4 38 mm x 89 mm.
Engineered joist and truss.
One hour roof ceiling assembly.
Ibc table 722 6 2 2 allows 10 minutes for wood floor or roof joists at 16 o c.
Maximum with 1 5 8 41 mm type s drywall screws 8 203 mm o c.
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.
Gypsum wallboard roof ceilings wood framing pitched roof truss 11 1 hr.
Resilient channels attached 16 406 mm o c.
With 1 25 mm type s drywall screws 12 305 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.
C roof ceilings45 51 steel framed including steel bar joist framing steel c joist framing steel truss and.
Assemblies include ducts dampers lighting or other fixtures in the tested assembly.
Figure 17 3 2 figure 17 3 2.
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.
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 joists wood i joists floor trusses and flat or pitched roof trusses spaced a maximum 24 o c.
2x4 lumber oriented vertically or horizontally.
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.
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.
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.
Is this possible without using channels and what ul number would i use.
