7 World Trade Center


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7 World Trade Center is a building in New York City located across from the World Trade Center site in Lower Manhattan. The name "7 World Trade Center" has referred to two buildings: the original structure, completed in 1987, and the current structure. The original 7 World Trade Center building was destroyed on September 11, 2001, and replaced with the new 7 World Trade Center, which opened in 2006. Both buildings were developed by Larry Silverstein, who holds a ground lease for the site from the Port Authority of New York and New Jersey.
The original 7 World Trade Center was 47 stories tall, clad in red exterior masonry, and occupied a trapezoidal footprint. An elevated walkway connected the building to the World Trade Center plaza. The building was situated above a Consolidated Edison (Con Ed) power substation, which imposed unique structural design constraints. When the building opened in 1987, Silverstein had difficulties attracting tenants. In 1988, Salomon Brothers signed a long-term lease, and became the main tenants of the building. On September 11, 2001, 7 WTC was damaged by debris when the nearby North Tower of the WTC collapsed. The debris also ignited fires, which continued to burn throughout the afternoon on lower floors of the building. The building's internal fire suppression system lacked water pressure to fight the fires, and the building collapsed completely at 5:21:10 p.m. The collapse began when a critical column on the 13th floor buckled and triggered structural failure throughout, which was first visible from the exterior with the crumbling of the east mechanical penthouse at 5:20:33 p.m.
The new 7 World Trade Center construction began in 2002 and was completed in 2006. It is 52 stories tall and still situated above the Con Ed power substation. 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 Greenwich Street occupies space that was part of the original building's footprint. The current 7 World Trade Center's design places emphasis on safety, with a reinforced concrete core, wider stairways, and thicker fireproofing of steel columns. 7 World Trade Center also incorporates numerous environmentally friendly features.