Brace Attic Trusses

Use a hammer to knock the bottom end loose.

Brace attic trusses.

Truss clusters for maximum strength this image shows a cluster of three trusses tied together. This can be done by bracing from the floor deck as shown below. Without bracing it is almost impossible to install trusses. Cut a 2 by 4 to fit horizontally from rafter to rafter on each truss.

Ceiling bracing this is only specified on our designs when no plasterboard is directly fixed to the underside of the trusses. 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. Slide the rest of the truss up using a 2x4 as a ramp if necessary.

Temporary bracing this is used to restrain the trusses during erection. Purlins 24 oc are typical along with the bottom bracing shown. The functions of roof bracing roof bracing performs three distinct functions. Trusses form the roof line on buildings and provide support for the lumber that holds shingles or other form of roof cover.

Many a carpenter has been killed or seriously injured when roof trusses suddenly collapse as they re erected. Lifting trusses higher than one story may require. 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. Nail these temporarily to the outside edges of the rafter sides starting with the third truss.

Nail braces vertically every 4 feet along the top and bottom of a gable truss. Cut the ends to the same angle you used for the pony wall studs. Start several trusses in. Section last after permanently bracing the rest of the trusses.

In from the gable end and brace it to the deck. Install 2x4s at a 45 degree angle. Nail them to the rafters and angle nail the center support to the top edge of the horizontal brace. Diagonal bracing is really important if you re working with roof trusses on that upcoming room addition.

Use a t brace to support the truss vertically. Turn the truss upside down and place on corner on the roof surface. Cut any diagonal braces in the truss with a reciprocating saw. Then work away from the braced end filling in the open 8 to 12 ft.

Alternatively start the first truss 8 to 12 ft. Truss stability bracing this is permanent bracing which holds the trusses upright straight and prevents any out of plane buckling of the members. Chevron bracing on occasions where this type of bracing is needed it usually covers a minimum of three truss webs half way to the apex of the truss at approximately a 45 degree angle.