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Temporary bracing should be 2x4 dimension
lumber or larger and should be 8 feet minimum in
length. Continuous lateral bracing maintains
spacing, but without cross bracing, permits trusses
to move laterally. See BCSI 1-02.
To prevent dominoing, diagonal bracing should be
installed in the plane of the webs as the trusses are
installed. See BCSI 1-02.
Full bundles of sheathing should not be placed on
the trusses. They should be limited to 8 sheets to
a pair of trusses. Likewise, other heavy
concentrated loads should be evenly distributed.
Inadequate bracing is the reason for most truss
installation failures. Proper installation is a vital
step for a safe and quality roof structure.
These recommendations are offered only as a
guide. Refer to Recommended Design
Specifications for Temporary Bracing of Metal Plate
Connected Wood Trusses (DSB-89) by the Truss
Plate Institute (TPI), or Handling, Installing and
Bracing (BCSI 1-02) by TPI. For cold formed steel
truss systems, refer to LGSEA's two publications,
Field Installation Guide for CFS Trusses,
and Design Guide for Construction Bracing of
CFS Trusses.
