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rise and fall of WTC

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sabbat hunter Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Feb-19-06 09:34 AM
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rise and fall of WTC
is on right now on the history channel. talks about the 47 interior steel columns. how the exterior skin was much more rigid than in any previous structure. how the trusses that connected the interior steel to the exterior skin. also how the interior steel columns carried the load of the elevators, mechanical floors.

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