Buro designed a custom stairwell and bulkhead to maximize the space of this small duplex and to connect the living spaces with the rooftop of this Chelsea apartment. To more efficiently connect the three levels, a continuous stair was developed and relocated to the center of the apartment where the spiral stair takes on a centrifugal character. The walls appear to spin off from the stair and organize the space around it. The path to of the stair culminates at the rooftop, where it informs the shape of the stainless steel bulkhead and canopy. Photo by Peter Murdoch