Brace Attic Trusses

Truss stability bracing this is permanent bracing which holds the trusses upright straight and prevents any out of plane buckling of the members.

Brace attic trusses.

The help of a second or third person is necessary even to lift a truss onto a single story roof. Section last after permanently bracing the rest of the trusses. Nail these temporarily to the outside edges of the rafter sides starting with the third truss. Cut a 2 by 4 to fit horizontally from rafter to rafter on each truss.

Begin with the second gable end truss and work back towards the first gable end. Cut the ends to the same angle you used for the pony wall studs. Temporary bracing this is used to restrain the trusses during erection. To strengthen the roof system truss clustering cross bracing and wind bracing is recommended at both end of the buildings and every 20 for longer span buildings.

The functions of roof bracing roof bracing performs three distinct functions. Brace other rafters as they are installed down the roof by nailing temporary 2 by 4 supports to rafter edges and to roof joists if rafters are being installed separately. Install 2x4s at a 45 degree angle. Once the roof trusses are stacked into a place they can be positioned one at a time.

Bracing the second gable end is advisable. Cut any diagonal braces in the truss with a reciprocating saw. The remainder of the trusses should. This can be done by bracing from the floor deck as shown below.

Use a t brace to support the truss vertically. See product data sheet no 3 for more information. Truss clusters for maximum strength this image shows a cluster of three trusses tied together. Some bracing provides a way to put up the trusses evenly while holding them and other bracing supports them after they are put up.

This is done by plumbing the truss and securing as described above for the first gable end. Alternatively start the first truss 8 to 12 ft. Step 2 lift trusses onto roof. Start several trusses in.

In from the gable end and brace it to the deck. Without bracing it is almost impossible to install trusses. Use 1 by 4 inch boards called purlins as temporary braces for rafter trusses. Use a hammer to knock the bottom end loose.

It is best to brace the inside of the trusses before handling them. Nail them to the rafters and angle nail the center support to the top edge of the horizontal brace.