527 W. 23rd Street

Cost: $50 million

Development Team

Owner and Developer: The Related Companies, NYC
Construction Manager: Kreisler Borg Florman, Scarsdale, N.Y.
Architect: Rockwell Architect & Planning, NYC
Architect: Ismael Leyva, Architect, NYC
Structural Engineer: Thornton-Tomasetti Engineers, Newark, N.J.
MEP Engineer: Robert Ettinger Associates, NYC
Excavation and Foundation Contractor: Urban Foundation/Engineering, East Elmhurst, N.Y.
Concrete Superstructure Contractor: Carlton Concrete Corp., Mineola, N.Y.

Development keeps moving west in Manhattan. Witness the completion of 527 W. 23rd Street in August. The new building, developed and owned by The Related Cos., is located between 11th and 12th avenues. It is a $50 million, 340,000-sq.-ft., 313-unit project.

The building is supported on 580 steel H-piles that were driven down to the bedrock. Concrete pipe piles were used on the east side of the site; a pile foundation was used on the west side.

"Some of the adjacent buildings were very old," said Robert Borg, founder and chairman of Kreisler Borg Florman General Construction Co., which served as project manager for 527 West. "We had to stabilize and strengthen a number of their foundations." The Rath Building for example, encroached 18 in. onto the project's property. KBF got permission from the building's owner to shore up its building from the interior and remove the 18 in. that overlapped.