Attic Truss Bracing Details

Purlins 24 oc are typical along with the bottom bracing shown.

Attic truss bracing details.

The ultra light multi brace delivers simple shipping handling on the ground and in the roof system assuring you of a safe and accurately braced roof system. An attic trussis a type of roof truss with an open space at its bottom center to accommodate a living space with webbing above and on either side of this living space. Wind or wall bracing this bracing is installed in the roof in addition to the truss stability bracing and its purpose is to stabilise the gable walls under the action of wind loading. View the following detail guides.

It is very important that the contractor or homeowner responsible for truss erection read through all documents inside the job packet. As spans increase bracing becomes even more critical. Plumb cuttop chord end cut to provide for vertical plumb installation to fascia face trim board. Truss stability bracing this is permanent bracing which holds the trusses upright straight and prevents any out of plane buckling of the members.

For the purposes of this chapter the guidance and use of standard trussed rafter bracing does not apply to homes on or near exposed sites e g. In the absence of a designed temporary bracing plan bcsi is the industry guideline for the generalized implementation of temporary bracing that framers must follow. Some truss manufacturers will also note basic details of bracing such as bracing size 1x4 2x4 and even nailing to webs. Temporary bracing is a means and methods issue and is the responsibility of the contractor in accordance with the construction documents or the truss submittal package.

Plumb risevertical overall measurements at the end of a truss where the top and bottom chords meet. Some of these standard details may be sealed upon request. Trusses which are not braced or which are not braced correctly are subject to toppling over or collapse. The mitek multi brace is the all purpose brace that satisfies virtually all of your permanent truss bracing requirements yet installs more quickly without adding costs.

Contact mitek engineering support for any questions. Roof truss repair details. Smaller structures that are sheathed in metal or osb require less bracing assuming proper truss connection details are used. Plenum typically the use of the entire floor truss cavity formed by the floor above and the ceiling below as a supply or return air duct.

In order to create an attic truss certain conditions must be met in the plan. 7 2 9 bracing for trussed rafter roofs trussed rafters shall be suitably braced to support applied loads and self weight without undue movement.