Roof Trusses Wind Brace

Sketch of a roof showing some of the parts.

Roof trusses wind brace.

Roof bracing must be applied in opposing directions with the number location and tie down of bracing units to be determined as described in the relevant standard. It is very important that the contractor or homeowner responsible for truss erection read through all documents inside the job packet. Truss stability bracing this is permanent bracing which holds the trusses upright straight and prevents any out of plane buckling of the members. Alternatively start the first truss 8 to 12 ft.

Roof sheathing plywood osb provides effective lateral bracing when sheathing is nailed directly to top chords. Section last after permanently bracing the rest of the trusses. Sloping top chord of roof trusses must resist compression force due to gravity downward load on the roof such as snow load. Wind bracing keeps the roof trusses upright and square to the roof basically they stop the roof from being blown down when its being constructed but more importantly when its tiled.

Wind bracing should be placed at 30 60 angles. Roof bracing is a pre punched v shaped component that fixes in an x or v pattern to the top of the top chord to firmly brace roof trusses to the building frame. The images below show these critical components and their recommended placement. Trusses which are not braced or which are not braced correctly are subject to toppling over or collapse.

Use a t brace to support the truss vertically. It is best to brace the inside of the trusses before handling them. Now that the trusses are installed i make sure all the poles are plumb and headers are straight. The old timber wind bracing as shown in this sketch using say 150 x 35 to 100 x 50 is just about redundant.

This condition generally applies when trusses are spaced at 2 feet. Install 2x4s at a 45 degree angle. It can be timber or metal strut in compression or a tie in tension. This can be done by bracing from the floor deck as shown below.

Nail braces vertically every 4 feet along the top and bottom of a gable truss. Wind bracing truss clusters at both gable ends and at least every 20 add wind bracing green for truss clusters. Then work away from the braced end filling in the open 8 to 12 ft. A structural member that stiffens a structure against the forces of the wind.

Bracing bracing of trusses is extremely important. In from the gable end and brace it to the deck. Start several trusses in.