|Other name(s):||North Tower|
|Beginning of works:||1966|
|Completion:||4 April 1973|
|Status:||destroyed (11 September 2001)|
Manhattan, New York, New York, USA
|Address:||1 World Trade Center|
Two World Trade Center (1973)
National September 11 Memorial and Museum at the World Trade Center (2011)
|Coordinates:||40° 42' 43.62" N 74° 0' 47.43" W|
|height to antenna tip||526 m|
|number of floors (above ground)||110|
|dimensions at base||63.4 m x 63.4 m|
|gross floor space (per floor)||4 000 m²|
|gross floor area||ca. 418 000 m²|
|floor height||3.65 m|
|building core||dimensions at base||26 m x 41 m|
|structural steel||78 000 t|
|wind resistant to||240 km/h|
|cost of construction||United States dollar 700 000 000|
First tenants move into One World Trade Center.
|26 February 1993, ca. 12:28||
Islamic terrorists detonate a bomb causing 6 deaths and hundreds of injuries; one tower remains closed for one month.
|11 September 2001, 08:45||
A hijacked Boeing 767 by American Airlines crashes into the north façade of One World Trade Center in an apparent terrorist attack. The plane hits floors 94 through 99 and explodes causing severe fires in the building.
|11 September 2001, 09:03||
Another hijacked airplane, a United Airlines Boeing 767, crashes into the southern façade of Two World Trade Center causing a severe explosion. Floors 78 to 84 are hit directly in the impact.
|11 September 2001, 09:59||
Two World Trade Center collapses 56 minutes after impact. The collapse also crushes Three and Four World Trade Center.
|11 September 2001, 10:29||
One World Trade Center collapses 1 hour and 43 minutes after impact. Five and Six World Trade Center are severely damaged by the falling debris.
|30 May 2002, 10:29||
In an official ceremony, the last column remaining from the World Trade Center rubble is removed and the cleanup work at ground zero is formally completed. The official death toll of the destruction of the World Trade Center in New York is set at 2 823 dead. The remains of 1 731 victims were never recovered.
The World Trade Center towers were built to resist the impact of a Boeing 707.
Aerialist Philippe Petit walked between the two towers on a tightrope in 1974.
During the collapse of the Twin Towers, 2 830 people lost their lives including 2 270 occupants in the buildings, 157 passengers and crew on board the aircraft and 403 emergency response personnel on the ground.
- Skilling Helle Christiansen Robertson
Leslie E. Robertson & Associates, R.L.L.P.
- Leslie Earl Robertson (structural engineer)
Relevant Web Sites
- archINFORM: World Trade Center
- BBC News: How the World Trade Center fell
- BBC News: World Trade Disaster
- Building Conservation Technology: 11 September 2001
- CNN: Ceremony to close 'Ground Zero' cleanup (30.05.02)
- CNN: Engineer finds clues in WTC wreckage
- CNN: Specials: Day of Terror
- CNN: Specials: Recovery
- CNN: Tod Rittenhouse: Why the World Trade Center collapsed
- CNN: World Trade Center: A city in towers
- Dan Heller Photography: World Trade Center
- FEMA: World Trade Center Performance Study
- Great Buildings Online: World Trade Center
- Le Monde: conférence UTLS: Pourquoi le World Trade Center est-il tombé? par Geoff Rooke
- LERA Project Gallery: World Trade Center
- National Commission on Terrorist Attacks Upon the United States
- New York's World Trade Center: A Living Archive
- NIST and the World Trade Center
- NY Times: Why Trade Center Towers Stood, Then Fell
- PBS: America Rebuilds - A Year at Ground Zero
- PBS: Building Big - World Trade Center
- Spiegel-Online: World Trade Center: Der Anschlag von 1993
- Steve Spak: World Trade Center 9/11
- University of Sydney: World Trade Centre - New York - Some Engineering Aspects
- USA Today: Catastrophic Collapse
- World Trade Center (Mary Ann Sullivan)
- L'art de l'ingénieur. constructeur, entrepeneur, inventeur. Éditions du Centre Georges Pompidou, Paris (France), pp. 545-547. (1997):
- Award of Excellence Winner: Michael Burton. Creating order from chaos in leading the public-private construction team that responded to the Sept. 11 devastation at Ground Zero. In: Engineering News Record (22 April 2002). (2002):
- Bechtel Won't Run WTC Cleanup But Project Changes Still Loom. In: Engineering News Record (17 December 2001). (2001):
- Catastrophe du World Trade Center. Les vraies raisons techniques de l'effondrement. In: Le Moniteur des Travaux Publics et du Bâtiment, n. 5104 (21 September 2001), pp. 18-21. (2001):
- Debris Mountain Starts To Shrink. In: Engineering News Record (1 October 2001). (2001):
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