Tower 3 : 175 Greenwich Street

Tower 3 (175 Greenwich Street) will sit at the center of the various buildings around the WTC Memorial site and rise to a height of 1,137 feet. Architect Rogers Stirk Harbour + Partners designed the tower to address this central position, with its verticality accentuated relative to the memorial site.

With 54 office floors, the 71-story tower includes 2.1 million sq ft of office space and five trading floors. The footprint of a typical floor is approximately 200 ft by 198 ft. At ground floor level, the footprint of the building is 50,000 square feet. At trading floor level, this increases to 55,000 square feet.

Tower 3 will have five retail levels -- the ground floor, two below grade levels and two levels above the ground floor -- that total 133,000 sq ft (of which 73,000 sq ft is at or above street level).

Among many building enhancements, Tower 3 features a central concrete core and an external structural steel frame. Safety systems will exceed the city's building code and Port Authority requirements. Designed to the highest energy efficiency ratings, 175 Greenwich Street will seek to achieve the Gold standard under the Leadership in Energy and Environmental Design (LEED) by the U.S. Green Building Council.

The design for Tower 3 uses a structural load-sharing system of diamond-shaped bracing which helps to articulate the building's east-west configuration. All corners of the tower are column free to ensure that occupiers of the office levels have unimpeded 360 degree panoramic views of New York.