ENR New York

In Manhattan, the 32-story planned hotel at 255 W. 34th St. will function as two buildings in one—in both use and construction method. The first eight floors will be framed in steel, in part to accommodate retail tenants who prize column-free spaces, with the remaining 24 stories made of flat plate concrete, says Neill Parker, project manager at Stonehill Taylor. Builders also are using a secant-pile wall system to drill concrete deeper than existing footings of neighbors immediately to the east and north, “almost like beams running up and down, like a Daniel Boone fort,” he says.