Roof Truss Lateral Support

At places of heavy rainfall or heavy snowfall sloping roofs are necessary which have to be supported by roof trusses.

Roof truss lateral support.

The clr must be properly braced to prevent the simultaneous lateral deformation and or buckling of the series of truss members to which it is attached due to laterally imposed loads on and or the accumulation of buckling forces within the. Wind bracing should be placed at 30 60 angles. The number of trusses clustered depends on building span and truss spacing. Permanent bracing listed on the truss design drawing for specific web members and permanent bracing for the roof or floor system.

Part of a truss that extends beyond its support exclusive of overhang. In this situation the walls of a finished attic space or room would go with the roof line. Roof sheathing plywood osb provides effective lateral bracing when sheathing is nailed directly to top chords. Extra support for the trusses can be made by placing a 2 by 4 inch piece of lumber from each truss on one side to the truss on the other side high enough to provide head room but low enough to provide support for the trusses.

The images below show these critical components and their recommended placement. When truss spacing exceeds 2 feet purlins are generally required to support roof sheathing. There are two separate types of bracing to be concerned about. Also need sloping roofs and hence roof trusses.

Roof trusses become necessary when sloping roofs have to be provided. At both gable ends and at least every 20 add wind bracing green for truss clusters. Workshops warehouses industrial buildings etc. Certain truss members require bracing in order to carry the full design load.

This condition generally applies when trusses are spaced at 2 feet.