A wood nailer matches the steel beam flange width and is secured with seven-eighths-inch diameter welded threaded rods at sixteen inches on center, staggered across the beam with a maximum three-quarter-inch countersink. Place one threaded rod a maximum of nine inches from each end of the nailer and from each splice. Sub-purlins bear adjacent to the nailer, maintaining a two-and-a-half-inch minimum typical spacing with multiple rows of nailing per spacing requirements. The structural steel beam accommodates optional five-inch diameter maximum holes for pipes spaced at ten feet on center minimum when required per approved sprinkler drawings.
4x NAILER x BM FLANGE WIDTH w/ 7/8"Ø WELDED THREADED RODS @ 16"OC STAGGERED ON BEAM COUNTERSANK (3/4" MAX). PLACE ONE ROD 9" MAX FROM EA END OF NAILER & FROM EA SPLICE. SUB-PURLIN SEE PLAN 8 1/2" ± STEEL BEAM SEE PLAN 16" 16" 32" NAILER PLAN VIEW (2) ROWS AT BN SPACING (4 LINES WHERE BN IS STAGGERED, 6 LINES WHERE 3 LINES OF NAILING IS REQD) 5"Ø MAX HOLE FOR PIPES @ 10'-0"OC MIN IF REQUIRED PER APPROVED SPRINKLER DARWINGS 2 1/2" MIN TYP USE 3x NAILER @ 22A
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