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7 World Trade Center is the name of two buildings in New York City, located in Lower Manhattan across from the World Trade Center site. The original building, developed by Larry Silverstein in the 1980s, was 47 stories tall, clad in red exterior masonry, and occupied a trapezoid-shaped footprint. The building was constructed above a Con Edison power substation, which imposed some unique structural design constraints. An elevated walkway connected the building to the World Trade Center plaza. The original building opened in 1987 and had difficulties attracting tenants at first. In 1988, the Salomon Brothers signed a long-term lease, and became the main tenants of the building. During the September 11, 2001 attacks, this original structure was heavily damaged by debris when the adjacent twin towers collapsed. Its structural integrity was further compromised by fire, and the combined effect of structural damage and fire resulted in its collapse at 5:20 p.m. on September 11. By 2002, construction of a replacement building was underway. The new building, completed in 2006, is 52 stories and also is above a power substation. It was built on a smaller footprint than the original to allow Greenwich Street to be restored from TriBeCa through the World Trade Center site and south to Battery Park. The new building is bounded by Greenwich, Vesey, Washington, and Barclay streets. A small park across the street, between Greenwich and West Broadway, occupies space that was part of the original building's footprint. The new building's design placed emphasis on safety, with a reinforced concrete core, wider stairways, and thicker fireproofing of steel columns. The new 7 World Trade Center also has numerous environmentally friendly features, which enabled it to gain gold status in the U.S. Green Building Council's LEED program. (more...)

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