Structural framing and attachment methods support a roof access hatch on structural steel framing and metal decking. The hatch base fastens directly to the steel top flange or an optional three-eighths-inch plate extension coordinated with the manufacturer dimensions. Supporting channels or wide-flange members feature an angle brace assembly spaced at a maximum of eight feet with a minimum of one brace assembly at midspan. Neighboring beams and deck direction are coordinated per plan to accommodate the roof access stair.
DECK DIRECTION PER PLAN NOTES: 1. ROOF ACCESS HATCH BASE MAY BE DIRECTLY FASTENED TO STEEL TOP FLANGE OR PLATE EXTENSION AT GC OPTION AS SHOWN ABOVE. GC TO COORDINATE STEEL FRAMING AND PLATES PER HATCH MFGR DIMENSIONS. 2. GC TO COORDINATE STEEL FRAMING LOCATIONS IN RELATION TO DELEGATED ROOF ACCESS STAIR. 3. AT EACH CHANNEL/WIDE-FLANGE SUPPORTING THE ROOF ACCESS HATCH (4 MEMBERS TOTAL), PROVIDE THE ANGLE BRACE ASSEMBLY OF AT 8'-0" SPACING MAX. PROVIDE MIN OF 1 BRACE ASSEMBLY AT CHANNEL/WIDE-FLANGE MIDSPAN MAX 5" POSSIBLE ALTERNATE HATCH BASE ATTACHMENT LOCATIONS ROOF ACCESS HATCH 3/8" PL WHERE REQ. WELD PER DETAIL ROOF ACCESS HATCH 3/8" PL WHERE REQ. WELD PER DETAIL NEIGHBOR BEAM PER PLAN CHANNEL PER PLAN POSSIBLE ALTERNATE HATCH BASE ATTACHMENT LOCATIONS MAX 5" 2/S5.211 2/S5.211 NEIGHBOR BEAM PER PLAN SEE NOTE 3 SEE NOTE 3 6/S5.204
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