Concrete filled pan treads are supported by a metal angle bracket welded or bolted to the stringer channel typical. Dimensions indicate an eleven inch minimum tread width with a one inch nosing projection and a six and thirteen-sixteenth inch maximum riser height. The stringer channel follows the stair slope with a twelve inch overall depth dimension per stair plan.
METAL ANGLE BRACKET SEE STAIR PLAN 11" MIN 1" 6 13/16" MAX 05 51 00 STRINGER CHANNEL PAN TO STRINGER TYP CONCRETE FILLED PAN TREAD, SSD 12"
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