Step 2: Cross-bracing subsequent trusses to prevent buckling


As trusses are continuously set in place, sufficient temporary bracing is applied to hold the trusses plumb, in alignment and secure untill permanent bracing, decking and/or sheathing can be installed. Temporary bracing should not be less than 38 × 89 mm lumber and should be as long as possible. The use of short spacer pieces of lumber between adjacent trusses is not considered a means of bracing. Temporary bracing should be nailed with two 3-1/2" double headed nails at every intersection with the braced members. The practice of removing bracing to adjust spacing of trusses as sheathing is applied can cause trusses to topple if a key connection is removed at the wrong time. Therefore, exact spacing of trusses should be maintained as temporary bracing is applied. Cross bracing should be installed as soon as the first few trusses are in place, in the vertical plane, between trusses, together with continuous lateral braces fastened to the top and bottom chords to prevent the trusses from toppling.