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SHSC HVAC and Roof Replacement Smith Sinnett / 2020072 <br />Orange County, North Carolina <br /> <br />STEEL DECKING 05 31 00 - 3 <br />J. Recessed Sump Pans: Single-piece steel sheet, 0.0747 inch thick, of same material and finish as deck, <br />with 3-inch- wide flanges and sloped recessed pans of 1-1/2-inch minimum depth. For drains, cut holes <br />in the field. <br />K. Flat Sump Plate: Single-piece steel sheet, 0.0747 inch thick, of same material and finish as deck. For <br />drains, cut holes in the field. <br />L. Galvanizing Repair Paint: SSPC-Paint 20 or DOD-P-21035, with dry film containing a minimum of 94 <br />percent zinc dust by weight. <br />M. Repair Paint: Manufacturer's standard rust-inhibitive primer of same color as primer. <br />PART 3 - EXECUTION <br />3.1 EXAMINATION <br />A. Examine supporting frame and field conditions for compliance with requirements for installation <br />tolerances and other conditions affecting performance. <br />3.2 INSTALLATION, GENERAL <br />A. Install deck panels and accessories according to applicable specifications and commentary in SDI <br />Publication No. 30, manufacturer's written instructions, and requirements in this Section. <br />B. Install temporary shoring before placing deck panels, if required to meet deflection limitations. <br />C. Locate deck bundles to prevent overloading of supporting members. <br />D. Place deck panels on supporting frame and adjust to final position with ends accurately aligned and <br />bearing on supporting frame before being permanently fastened. Do not stretch or contract side-lap <br />interlocks. <br />1. Align cellular deck panels over full length of cell runs and align cells at ends of abutting panels. <br />E. Place deck panels flat and square and fasten to supporting frame without warp or deflection. <br />F. Cut and neatly fit deck panels and accessories around openings and other work projecting through or <br />adjacent to deck. <br />G. Provide additional reinforcement and closure pieces at openings as required for strength, continuity of <br />deck, and support of other work. <br />H. Comply with AWS requirements and procedures for manual shielded metal arc welding, appearance and <br />quality of welds, and methods used for correcting welding work. <br />I. Mechanical fasteners may be used in lieu of welding to fasten deck. Locate mechanical fasteners and <br />install according to deck manufacturer's written instructions. <br />3.3 ROOF-DECK INSTALLATION <br />A. Roof Deck Span Condition shall be 2 span minimum unless shown otherwise on structural drawing. <br />B. Fasten roof-deck panels to steel supporting members by arc spot (puddle) welds of the surface diameter <br />indicated or arc seam welds with an equal perimeter that is not less than 1-1/2 inches long, and as <br />follows: <br />1. Weld Diameter: 5/8 inch, nominal. <br />2. Weld Spacing: Weld edge and interior ribs of deck units with a minimum of two welds per deck <br />unit at each support. <br />C. Side-Lap and Perimeter Edge Fastening: Fasten side laps and perimeter edges of panels between <br />supports, at intervals not exceeding the lesser of 1/2 of the span or 36 inches, and as follows: <br />1. Mechanically fasten with self-drilling, No. 10 diameter or larger, carbon-steel screws. <br />2. Mechanically clinch or button punch. <br />3. Fasten with a minimum of 1-1/2-inch- long welds. <br />DocuSign Envelope ID: 94E7997D-4F29-42F6-A9B4-0A160438D2A6