The drawing details a set of concrete stairs descending alongside a waterproofed concrete wall and foundation slab. It includes a metal handrail system, a column grid line, and mechanical equipment or storage tanks situated underneath or adjacent to the stair run within a subterranean space.
LEVEL TN -11' - 8" B.23 (14) EQUAL RISERS 8' - 0" TUNNEL 2' - 0" A503 5 SIM COL WATERPROOFING
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