3 World Trade Center by Rogers Stirk Harbour + Partners (RSHP)

3 World Trade Center or 3WTC also known as 175 Greenwich Street is 3rd tallest skyscraper on WTC site in New York. Designed by Rogers Stirk Harbour + Partners (RSHP), recently slightly redesigned, 3WTC will grow to 357m (1170ft) with 80 floors. 3WTC will include 2.8 million square feet of office space spread across 53 floors and five trading floors. Office levels will range from 29,000 to 44,000 square feet, and trading floors will include 68,000 square feet of space  3WTC will have five levels of retail at and below grade.

"The tower will consist of a reinforced concrete core with steel structure outside the core, and be clad in an external structural steel frame. Its safety systems will exceed New York City building code and Port Authority of New York and New Jersey requirements, and  it will seek to achieve the LEED Gold standard for energy efficiency.  

With a structure that is exposed and visible, the Rogers Stirk Harbour + Partners design for 3 World Trade will stand out at the center of the World Trade center site. The defining aspect of 3WTC is its load-sharing system of diamond-shaped bracing, which helps to articulate the building's east-west configuration. This allows unimpeded 360-degree panoramic views of New York.

 The three-story high lobby will provde visitors a "big picture window" of the memorial outside.  Upper level floors will straddle those beneath in a ‘podium building formation, lending the tower a distinct interlocking nature and facilitating the high occupancy of the office floors.
Finally, the redeveloped Cortlandt and Dey Streets that interface with 175 Greenwich Street will improve the accessibility both of the retail space in the building and of the WTC Transportation Hub to the north of Dey Street."

Construction picture from June 2012 by Joe Woolhead

Current design:

Old design:

Info and picture source

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