The detail illustrates a steel stair assembly featuring steel plates (PL 1/2" x 15.5" and PL 1/2" x 18") forming the stringers and landing support. The stair connects down to a reinforced concrete slab or foundation and ties into a W12x14 structural steel beam at the upper landing. Callout bubbles indicate reference details LO S6.0.6 for both the bottom and top connection points.
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