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Originally Posted by fastom
So fast? Construction started in the mid sixties and they opened in the seventies!
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It was actually about four years until the first tower was completed and tennants began to move in (1966 - 1970)
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http://en.wikipedia.org/wiki/World_Trade_Center)
I don't think that is fast or slow. if you look up buildings built around the same time with similar height the building times are similar. WTC is a little longer but that is probably related to it being a multi-tower complex rather than just one building.
As an interesting aside, according to wikipedia (
http://en.wikipedia.org/wiki/Petronas_towers), it took three years to build the Petronas towers. This was of course much more recent. The interesting thing however was the that each tower was built by a different construction company. It was kind of a competition to see who could get their tower up faster.