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April 2023 #15285 Page #104
Bracing on Truss Design Drawings
By MiTek Staff
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russes are designed as individual components to resist the in-plane stresses resulting from the loads applied in the same in-plane direction. To resist out of plane forces, adequate bracing/restraint is required. In absence of designed temporary and permanent bracing plans, BCSI (Building Component Safety Information) is the industry bracing guideline that framers must follow. Lateral Bracing/Restraint keeps the compression members of the truss from out of plane buckling due to applied loads shown on the Truss Design Drawing. Per ANSI/TPI 1 (National Design Standard for Metal Plate Connected Wood Truss Construction), it is the responsibility of the truss designer to provide required permanent individual truss member restraint location. Bracing on the truss design drawing is denoted by the symbol " x ". Truss design drawings show the bracing to be located on a side of the member needing bracing/restraint. The actual application of the bracing, whether on the top edge of the member or on the bottom edge of the member, is not important. What is critical is the specific location (i.e., midpoint of the web member) of the bracing/ restraint and the number of rows. If the brace/restraint cannot physically be placed on the side of the member as the drawings show, then place it on the member at the same location except attach it to the opposite edge as shown below.
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