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Originally Posted by THE BIG APPLE
^ So how come the Barclay Vesey Building didn't collapse? How come 90 West Street (94 year old building on 9/11) didn't collapse?
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These were built with masonry protecting structural steel. Hence why they did not collapse. They may not have collapsed, but they were sure damaged significantly (the entire interior of 90 West Street was destroyed by fire, whereas the Verizon Building suffered significant damage to it's east and southern façades from the collapses of 1 and 7 WTC, to the tune of $1.2 Billion.)
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How come nothing but minor damage occurred to the WFC? How come the Century 21 Building didn't collapse? How come 1 Liberty Plaza didn't collapse? How come the Winter Garden (which is basically a hollow glass atrium) didn't collapse? How come the Millennium Hotel didn't collapse?
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Too far away for significant damage to have occurred. These buildings were, however, showered by concrete and debris and were still damaged nonetheless. And it wasn't minor damage to the WFC; WFC3 (pyramid top) required shoring as several perimeter columns were damaged by the collapse of the North Tower.
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How come the U.S Post Office Building didn't collapse?
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Same reason 90 West and Barclay-Vesey didn't collapse. Masonry protecting structural steel. Plus it was too far away from the towers to be damaged by falling steel.
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Even the Deutsche Bank Building and Fiterman Hall didn't collapse (but were deconstructed).
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Yes, but those buildings were not repairable after the attack (well, the Deutsche Bank building probably was). They were both heavily contaminated by debris and were subsequently written off.