Brace Attic Trusses

Nail them to the rafters and angle nail the center support to the top edge of the horizontal brace.

Brace attic trusses.

Truss clusters for maximum strength this image shows a cluster of three trusses tied together. Cut a 2 by 4 to fit horizontally from rafter to rafter on each truss. 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 hammer to knock the bottom end loose. 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. This can be done by bracing from the floor deck as shown below. 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 is done by plumbing the truss and securing as described above for the first gable end. Cut the ends to the same angle you used for the pony wall studs. Alternatively start the first truss 8 to 12 ft.

Use 1 by 4 inch boards called purlins as temporary braces for rafter trusses. 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. Use a t brace to support the truss vertically. The help of a second or third person is necessary even to lift a truss onto a single story roof.

In from the gable end and brace it to the deck. The remainder of the trusses should. Nail these temporarily to the outside edges of the rafter sides starting with the third truss. Section last after permanently bracing the rest of the trusses.

Temporary bracing this is used to restrain the trusses during erection. Some bracing provides a way to put up the trusses evenly while holding them and other bracing supports them after they are put up. Without bracing it is almost impossible to install trusses. See product data sheet no 3 for more information.

Truss stability bracing this is permanent bracing which holds the trusses upright straight and prevents any out of plane buckling of the members. Step 2 lift trusses onto roof. Bracing the second gable end is advisable. Cut any diagonal braces in the truss with a reciprocating saw.

Start several trusses in. Purlins 24 oc are typical along with the bottom bracing shown.