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, washroom counter, vault, urinal, toilet stall, toilet, straight staircase, straight run stairs, stair section, stair landing, stair direction, stair break, spiral staircase, sink, scissor staircase, ornamental stair, ornamental staircase, hand rail, handrail, freight elevator, escalator, elevator, divided return stairs, corner landing, corner hand rail, chute, Z-shaped stairs, Z-shaped staircase, L-shaped stairs, L-shaped staircase,

Design elements - Building core