Foundation, Concrete and Earthquake Engineering

What were the Defects in World Trade Center Design?

The World Trade Center was in Lower Manhattan, New York City, United States which is also known as twin towers. The complex opened on April 4, 1973, and was destroyed in 2001 during the September 11 attacks. The site is being rebuilt with five new skyscrapers and a memorial to the casualties of the attacks. Of which, only one skyscraper has been completed with four more expected to be completed before 2020. While New skyscrapers are built in the site and others are pending to build or approved, it is a question the WTC was a faulty designed.

The answere of above question is the World Trade Center was not defectively designed. No designer of the WTC anticipated, nor should have anticipated, a 90,000 L Molotov cocktail on one of the building floors. Skyscrapers are designed to support themselves for three hours in a fire even if the sprinkler system fails to operate. This time should be long enough to evacuate the occupants. The WTC towers lasted for one to two hours—less than the design life, but only because the fire fuel load was so large. No normal office fires would fill 4,000 square meters of floor space in the seconds in which the WTC fire developed. Usually, the fire would take up to an hour to spread so uniformly across the width and breadth of the building. This was a very large and rapidly progressing fire (very high heat but not unusually high temperature).

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