Steel Roof / Floor Deck Sheet Takeoff
Structural steel deck - sheets by net cover, and the side-lap run that sizes the fastening: cover area = cover width x sheet length; sheets = ceil(area x (1 + waste) / cover area); side lap = area / cover width. 10,000 sf on a 36 in cover, 30 ft deck at 5% waste is 117 sheets and ~3,333 LF of side lap; a narrower 24 in cover is 175 sheets and 5,000 LF - more sheets and more button-punch/weld fastening. Distinct from exposed metal-roof-panels; the SDI and drawings set the fastening.
Formula and source
cover_sf = (cover_width_in/12) x sheet_length_ft; sheets = ceil(area_sf x (1 + waste_pct/100) / cover_sf); sidelap_lf = area_sf / (cover_width_in/12).
Steel deck-takeoff identity by name (sheets from area over net cover coverage; side lap from area over cover width); first-principles takeoff arithmetic.
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