Seemingly a single, seamless unit, the stair is composed of two elements—treads and mezzanine—and held in place by two distinct strategies: The stairs are welded to, and cantilever out from, a series of steel tubes concealed in the walls; the mezzanine 

is attached on one side to a steel beam, and hung at two other points from rods attached to the roof structure.  Photo 3 of 15 in House by simi from Harlem Renaissance

House

3 of 15

Seemingly a single, seamless unit, the stair is composed of two elements—treads and mezzanine—and held in place by two distinct strategies: The stairs are welded to, and cantilever out from, a series of steel tubes concealed in the walls; the mezzanine

is attached on one side to a steel beam, and hung at two other points from rods attached to the roof structure.

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