Framing details for structural openings in metal roof decks utilize 4x3x1/4-inch angles on each side of the opening with long leg vertical, secured using five-eighths-inch diameter puddle welds at each low deck corrugation. Sixteen-gauge bent closure plates are provided on all sides of the opening and fastened to the low deck corrugation at twelve inches on center with five-eighths-inch diameter puddle welds. Details differentiate between framing configurations parallel and perpendicular to the metal deck direction, incorporating deck closure angles connected to steel angles below with fillet welds. Specific provisions limit maximum opening dimensions to two feet and reference separate details for smaller or larger penetrations.
2'-0" MAX. W/1.5 2'-0" MAX. W W/1.5 L 4"x3"x1/4" (L.L.V.) EACH SIDE OF DECK OPENING w/ 5/8"Ø PUDDLE WELD AT EACH LOW DECK CORRUGATION METAL DECK PER PLAN FILL OVER METAL DECK PROVIDE 16 GA. BENT CLOSURE PLATE ALL SIDES OF OPENING, PROVIDE 5/8" DIA. PUDDLE WELD TO LOW DECK CORRUGATION @ 12" O.C. DECK CLOSURE ANGLE FILL OVER METAL DECK W.O. OPENING PARALLEL TO DECK OPENING PERPENDICULAR TO DECK OPENING 1/8 2-12 CLOSURE ANGLE TO STEEL ANGLE BELOW TYP. 2" • FOR OPENINGS 6" OR SMALLER SEE 19/- • FOR LARGER OPENNGS SEE 17/-
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