2 Hour Roof Truss Assembly

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.

2 hour roof truss assembly.

Breakaway clip facings and height of wall differ between ul design u373 and whi gp wa 120 04. Layer 3 trusses. Pitched or parallel chord wood trusses spaced 24 max. 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.

A two hour assembly has been calculated and a copy of the report is available from sbca sbca srr 1509 02. 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. 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. O c fabricated from nom.

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. Helpful documents and resources for usg s roof assemblies can be found on this page. Sbca endeavors to expand component manufacturers. All new fire rated roof ceiling assembly files.

Our cad and revit library of design drawings of wall intersections joints and other construction details. 2x4 lumber oriented vertically or horizontally. And technical information disseminating industry news and facilitating networking opportunities for manufacturers of roof trusses wall panels and floor trusses. Find usg product specific cad and revit files.

Screw fastened perpendicular to lower chord of wood trusses of 2 x 4 38 mm x 89 mm. One basis for this type of analysis is harmathy s ten rules of fire endurance rating written in 1965. Gypsum wallboard roof ceilings wood framing pitched roof truss 11 1 hr. 2 hour fire endurance assembly for mpcwt structural floor and roof framing systems educational overview revised 10 2 2017.

Truss depth shall be 5 1 4 with a min. 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.