Roof Trusses Wind Brace

Nail braces vertically every 4 feet along the top and bottom of a gable truss.

Roof trusses wind brace. Sketch of a roof showing some of the parts. Alternatively start the first truss 8 to 12 ft. A structural member that stiffens a structure against the forces of the wind. Now that the trusses are installed i make sure all the poles are plumb and headers are straight.

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

The images below show these critical components and their recommended placement. 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. Trusses which are not braced or which are not braced correctly are subject to toppling over or collapse. Wind bracing should be placed at 30 60 angles.

Then i go through and install my runners along the bottom. Use a t brace to support the truss vertically. Sloping top chord of roof trusses must resist compression force due to gravity downward load on the roof such as snow load. Wind or wall bracingthis bracing is installed in the roof in addition to the truss stability bracing and its purpose is to stabilise the gable walls under the action of wind loading.

Truss stability bracing this is permanent bracing which holds the trusses upright straight and prevents any out of plane buckling of the members. 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. 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. It is very important that the contractor or homeowner responsible for truss erection read through all documents inside the job packet. Section last after permanently bracing the rest of the trusses. Roof sheathing plywood osb provides effective lateral bracing when sheathing is nailed directly to top chords.

The old timber wind bracing as shown in this sketch using say 150 x 35 to 100 x 50 is just about redundant. This can be done by bracing from the floor deck as shown below. If its a truss roof then wind bracing is important when they design the roof they also design a wind bracing plan so the wind braces are positioned correctly.