This assembly features four-by-six timber blocking installed between truss purlins, supported by one-quarter-inch by four-inch by seven-inch steel plates on each side. The plates are secured to the blocking with two three-quarter-inch diameter through-bolts at a four-inch gauge. The blocking is located two feet from each side of the truss purlins. Nailing requirements for the blocking include two rows at blocking-nailing spacing, with four lines where blocking-nailing is staggered and six lines where three lines of nailing are required. A one-quarter-inch fillet weld with a four-inch length is specified for the connection to the truss girder.
TRUSS GIRDER 4x6 BLOCKING BETWEEN TRUSS PURLINS PL 1/4"x4"x0'-7" EACH SIDE LOCATED 2'-0" FROM EACH SIDE OF TRUSS PURLINS W/ (2) 3/4"Ø THRU BOLTS @ 4"GA. 2" 2" TYP 4" 1 1/4" 1/4 4 (2) ROWS AT BN SPACING (4 LINES WHERE BN IS STAGGERED, 6 LINES WHERE 3 LINES OF NAILING IS REQD)
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