Concrete stair treads feature rounded edges with a maximum one-half inch radius and a maximum thirty-degree angle. Poured concrete nosings are built without cast nosings unless required by architectural drawings. Metal pan stair nosings receive cast nosings when specified on architectural drawings. Riser heights are detailed with a four-inch minimum and seven-inch maximum dimension.
POURED CONCRETE NOSING W/O CAST NOSING) CAST NOSING WHERE RQ. BY ARCH DWGS RADIUS TO MATCH RADIUS @ NOSING 4" MIN. 7" MAX METAL PAN NOSING W/O CAST NOSING) CAST NOSING WHERE REQ. BY ARCH DWGS 4" MIN., 7" MAX 30 DEG. MAX R=1/2" MAX
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