Brace Attic Trusses

Use a hammer to knock the bottom end loose.

Brace attic trusses.

Cut the ends to the same angle you used for the pony wall studs. This is done by plumbing the truss and securing as described above for the first gable end. Start several trusses in. Some bracing provides a way to put up the trusses evenly while holding them and other bracing supports them after they are put up.

Use 1 by 4 inch boards called purlins as temporary braces for rafter trusses. Temporary bracing this is used to restrain the trusses during erection. Alternatively start the first truss 8 to 12 ft. Nail these temporarily to the outside edges of the rafter sides starting with the third truss.

Bracing the second gable end is advisable. Cut any diagonal braces in the truss with a reciprocating saw. In from the gable end and brace it to the deck. Truss stability bracing this is permanent bracing which holds the trusses upright straight and prevents any out of plane buckling of the members.

Then work away from the braced end filling in the open 8 to 12 ft. Trusses form the roof line on buildings and provide support for the lumber that holds shingles or other form of roof cover. This can be done by bracing from the floor deck as shown below. Step 2 lift trusses onto roof.

Install 2x4s at a 45 degree angle. Begin with the second gable end truss and work back towards the first gable end. 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. Without bracing it is almost impossible to install trusses.

Cut a 2 by 4 to fit horizontally from rafter to rafter on each truss. Once the roof trusses are stacked into a place they can be positioned one at a time. The remainder of the trusses should. See product data sheet no 3 for more information.

Purlins 24 oc are typical along with the bottom bracing shown. 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. It is best to brace the inside of the trusses before handling them. The functions of roof bracing roof bracing performs three distinct functions.

Use a t brace to support the truss vertically. Nail them to the rafters and angle nail the center support to the top edge of the horizontal brace.