Roof Truss Joist Bracing

Bracing bracing of trusses is extremely important.

Roof truss joist bracing.

This brace needs to be far enough up the trusses to provide headroom and still provide support for the trusses. Truss clusters for maximum strength this image shows a cluster of three trusses tied together. Purlins 24 oc are typical along with the bottom bracing shown. Once again a 2 by 4 inch piece of lumber is placed between the trusses and parallel to the ceiling joists.

Use a t brace to support the truss vertically. It is best to brace the inside of the trusses before handling them. A structural member installed at an angle approx. 45o to a truss chord or.

Bracing of top chords sloping top chord of roof trusses must resist compression force due to gravity downward load on the roof such as snow load. Turn the truss upside down and place on corner on the roof surface. Trusses which are not braced or which are not braced correctly are subject to toppling over or collapse. Diagonal bracing provides stability by resisting the domino effect of connected trusses.

Roof sheathing plywood osb provides effective lateral bracing when sheathing is nailed directly to top chords. It is very important that the contractor or homeowner responsible for truss erection read through all documents inside the job packet. 2 by 4 inch pieces of lumber are attached from each end of this brace to each ceiling joist perpendicular to the ceiling joist forming a wall and supporting each truss. Nail braces vertically every 4 feet along the top and bottom of a gable truss.

Install 2x4s at a 45 degree angle. A truss to reduce the laterally unsupported length of the truss member. The continuous lateral restraint forces the connected truss members to move in the same direction. 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.

Lifting trusses higher than one story may require a crane.