Traction stair tread planks frame into a C12x20.7 bent channel ladder stringer. The connection uses L 1 1/2 x 1 1/2 x 3/16 by 6 inches minimum long angles welded with 3/16 fillet welds. Risers are spaced equally for heights shown on section and verified with architectural drawings.
5 TREAD AT LADDER STRINGER CONN.
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