Concrete-filled metal pan stair treads and risers are supported by structural steel stair stringers via welded or bolted support angles. Each tread features a full-width cast abrasive nosing and a two-inch contrasting stripe. Selected areas receive SRF-1 rubber flooring applied over the concrete fill. Dimensional callouts indicate a maximum seven-inch riser height, an eleven-inch minimum tread depth, and a three-inch clearance.
LUZ 3" CLR 7" MAX 11" MIN STAIR STRINGER METAL PAN TREADS & RISERS W SUPPORT ANGLES CAST ABRASIVE NOSING- FULL WIDTH (TYP.) SEALED CONCRETE- FILLED METAL PAN STAIR TREAD, TYP. 2" CONTRASTING STRIPE SRF-1 RUBBER FLOORING OVER CONCRETE-FILLED METAL PAN STAIR TREADS & RISERS, AT CAB STAIR C. F G H
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