The assembly consists of a concrete-filled landing platform supported by a steel stair stringer. The top of the stringer aligns with the landing surface, while the tread geometry is defined by a work point at the intersection of the stringer and the landing edge. The landing platform is specified as 033000 concrete-filled, with vertical dimensions indicating a 3-inch tread rise and a 6-inch depth for the supporting structure below the landing slab.
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