Roof Truss Lateral Support

Continuous lateral brace clr.

Roof truss lateral support.

At both gable ends and at least every 20 add wind bracing green for truss clusters. Certain truss members require bracing in order to carry the full design load. Workshops warehouses industrial buildings etc. Part of a truss that extends beyond its support exclusive of overhang.

This condition generally applies when trusses are spaced at 2 feet. A line of continuous structural members to a chord or web member of a truss to reduce the laterally unsupported length of the truss member. When truss spacing exceeds 2 feet purlins are generally required to support roof sheathing. In this situation the walls of a finished attic space or room would go with the roof line.

The number of trusses clustered depends on building span and truss spacing. 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. Also need sloping roofs and hence roof trusses. 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.

Continuous lateral bracing or restraint is very important. At places of heavy rainfall or heavy snowfall sloping roofs are necessary which have to be supported by roof trusses. Roof sheathing plywood osb provides effective lateral bracing when sheathing is nailed directly to top chords. Roof trusses become necessary when sloping roofs have to be provided.

There are two separate types of bracing to be concerned about.