A typical channel stringer connects to the stair landing framing with a 3/8-inch connecting plate secured by two 3/4-inch diameter machine bolts, welded with 3/16-inch fillet welds. The landing utilizes a C4 channel supported by a C12 channel, while a 1/4-inch thick closure plate caps the transition at the top of the stringer. The stair landing assembly maintains a half-tread dimension relative to the framing boundary, with finishes sized per plan.
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