On the two upper floors of their duplex there are nearly 30-foot ceilings in some areas, a loft, exposed brick, pipes for railings, stained ... a dormer and a spiral staircase, reconfigured ...

Bjarke Ingels Group (BIG) is responsible for the latest addition to Hudson Yards, a supertall glass skyscraper named The Spiral for the ... which contains stairs, a feature which would not be ...