2 Hour Roof Truss Assembly

Pitched or parallel chord wood trusses spaced 24 max.

2 hour roof truss assembly.

Layer 3 trusses. Gypsum wallboard roof ceilings wood framing pitched roof truss 11 1 hr. Roof slope of 3 12. A two hour assembly has been calculated and a copy of the report is available from sbca sbca srr 1509 02.

And technical information disseminating industry news and facilitating networking opportunities for manufacturers of roof trusses wall panels and floor trusses. Screw fastened perpendicular to lower chord of wood trusses of 2 x 4 38 mm x 89 mm. Find usg product specific cad and revit files. 2x4 lumber oriented vertically or horizontally.

Truss depth shall be 5 1 4 with a min. Fire rated cold formed steel truss assemblies to properly design a building for fire safety building designers must recognize and accurately follow building fire code regulations. O c fabricated from nom. 2 hour fire endurance assembly for mpcwt structural floor and roof framing systems educational overview revised 10 2 2017.

Achieving a 2 hour floor ceiling assembly from the underside only home articles achieving a 2 hour floor ceiling assembly from the underside only one of our current projects is a change of occupancy where the change will require a 2 hour rating between the main level a 2 occupancy and the r 2 occupancy above. Our cad and revit library of design drawings of wall intersections joints and other construction details. Sound tested with 2 x 4 stud wall with 1 2 12 7 mm toughrock fireguard c gypsum wallboard or densarmor plus fireguard c panels each side of assembly and 3 1 2 89 mm fiberglass insulation in stud space both sides. Shaft wall limiting heights spans.

One basis for this type of analysis is harmathy s ten rules of fire endurance rating written in 1965. Helpful documents and resources for usg s roof assemblies can be found on this page. Sbca endeavors to expand component manufacturers. Refer to our roof ceiling assembly documents which includes ul fire rated roof assemblies for easy guidance through the assembly of a roof or ceiling on your next project.

1 5 hours nominal 2x3 24 oc min 10 depth truswal truss plates trusgard protective channels applied to bottom chord of each truss fire rated suspended ceiling min 7 1 2 below the truss sheathing min 3 4 nominal 2x3 24 oc min 10 depth truswal truss plates fire rated suspended ceiling min 7 1 2 below the truss sheathing min 3 4 fr. Building codes may require construction assemblies to have a fire resistance rating such as 1 hour 1 hour and 2 hour in specific construction types and occupancies.