World Trade Center

WTC was made up of:
– 200.000 tons of steel
– 325.000 cubic meters of concrete
– 43.600 windows
– 19.300 kilometers of electric cables
– Had its own zip code, 10048

Each Tower:
– Had 110 floors
– 63 m by 63 m at base
– Weighed 500,000 tons
– Was 417 m high (north tower)
– Was 415 m high (south tower)
– Contained 319 km of heating ducts
– 97 elevators for passengers, 6 for freight

When the twin towers of the World Trade Center were struck on September 11, 2001, it seemed at first that they might remain standing. But in less than two hours, both towers had collapsed to the ground. Click here to find out how the remarkable structural support system in these buildings eventually gave way.