Four World Trade Center

Four World Trade Center (also known by its street address, 150 Greenwich Street) is a skyscraper under construction as part of the new World Trade Center complex in New York City. It is located on the southeast corner of the 16-acre World Trade Center site, where the original nine-story 4 World Trade Center stood. Pritzker Prize-winning architect Fumihiko Maki was awarded the contract to design the building, which will be 974 feet (288 m) tall. As of right now it is the second tallest skyscraper on the rebuilt World Trade Center site behind One World Trade Center, although Two World Trade Center and Three World Trade Center are planned to surpass the building's height upon completion. The total floor space of the building is anticipated to include 1.8 million square feet (167,000 square meter) of office and retail space. The building's groundbreaking took place in January 2008, and it is scheduled to be completed by 2013. The structural engineer for the building is Leslie E. Robertson Associates, New York City.

1975-2001

The original 4 World Trade Center was a 9-story low-rise office building completed in 1975 that was 118 ft (36 m) tall and in the southeast corner of the site, in Lower Manhattan, New York City. The building's major tenants were Deutsche Bank (Floor 4, 5, and 6) and the New York Board of Trade (Floors 7, 8, and 9). The building's side facing Liberty Street housed the entrance to The Mall at the World Trade Center on the Concourse level of the WTC. It was damaged beyond repair as a result of the September 11 attacks and was later demolished to make way for the construction of the new skyscrapers, Four World Trade Center and Three World Trade Center. 4 World Trade Center was home to five commodities exchanges on what was at the time one of the world's largest trading floors (featured in the Eddie Murphy movie Trading Places). The new Four World Trade Center and Three World Trade Center will stand where 4 World Trade Center formerly stood.

Construction

Groundbreaking took place in 2008. The building reached street level in November 2009. The safety cocoon was installed December 2010. The first glass was installed May 2011. In November 2010, three PureCell fuel cells were delivered at the World Trade Center site which together will provide about 30% of the tower’s power.
On February 16, 2012, one of the building's construction crane cables snapped while lifting steel, causing the steel to fall 40 stories from the building, landing on a flat bed truck. No injuries were reported. Construction on the building eventually resumed after the accident.
Four World Trade Center was topped out on June 25, 2012.
As of August 17, 2012, the progress and the list of construction activities at the 4 World Trade Center site include

• Steel is now topped out at floor 72, with only upper mechanical and roof bulkhead construction remaining
• Curtain wall installation began in late April 2011 and is now above floor 58
• Utility work along Liberty Street (inside the work site fence line) is active in late July through August 2012
• Fireproofing and masonry, below-grade mechanical work, elevator shaft work are underway
• Two cranes are now active at the site