Popular Mechanics juli 1993
Popular Mechanics juli 1993. Den amerikanska populärtidskriften Popular Mechanics publicerade i juli 1993 en artikel om återuppbyggnaden av World Trade Center i New York som i februari 1993 utsattes för ett attentat då kraftiga bomber sprängdes i garaget under byggnaderna. Artikeln hävdar att Twin Towers var konstruerade för att stå emot kraften av en Boeing 707.
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| “ | "Pillars of strength. The wreckage was greater than anyone could have imagined, Maikish recalls. But the World Trade Center was in no danger of collapsing. "No other structure, no complex would have withstood that kind of blast," claims Maikish.
After all, the giant buildings are designed to resist a once-in-a-century wind blast of 150 mph. Each tower can sway up to 3 ft. in heavy winds. The instruments that record this swaying registered nothing from the explosion. The structures were also engineered to soak up the impact of a Boeing 707, the biggest plane in the skies when the towers went up in the late 1960s. This unique strength arises from the towers' unique steel curtain walls, the exterior frames designed by architect Minoru Yamasaki. Twenty-one steel columns, spaced 10 ft. apart and braced with horizontal spandrels, make up each facade of the towers. These are the main load-bearing components of the structures. True, the explosion did not occur within the footprint of either building, but even the loss of 10 columns in a tower could not have triggered a collapse says Fasullo." |
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- Popular Mechanics juli 1993
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