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| JackD | Aug 15 2008, 04:39 PM |
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the "dynamic" load argument breaks down in a hurry. here's the problem -- there is no discernable coherent massive block pushing down on the floors significantly below impact site. for instance, look at that photo from the JIm Hoffman book posted by SPreston, where collapse/demolition wave is halfway down. THERE IS NO LONGER AN UPPER PORTION PUSHING DOWN. the upper region has disintegrated into a mixture of powder, dis-incorporated steel, floor, and office contents. for 30 years, the floors 0-50 have been faithfully supporting 60 more floors above them. Now you tell me that you are turn the top 40-50 floors to NONCOHERENT falling mass of powder, steel, floors, acting as individual components rather than a single, united block, and the bottom 50% of the building can no longer support that load? Your argument about dynamic load COULD, with a lot of tweaking, explain the first floor or two of collapse. However, the CONTINUATION of the collapse seems unlikely to occur, given that the upper area was by and large DISINTEGRATED into separate components, which on their own were insufficient to maintain the thrust. look how much material is falling OUTSIDE the footprint of buildign, NONE of that can participate in the "crush down" phase. so how does the crush-down propagate after more than 2 or 3 floors>? See Scotsman Gordon Ross for some analysis: http://gordonssite.tripod.com/id2.html |
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| Evidence of a Top-Down Explosive Demolition · World Trade Center | |
3:53 AM Nov 30
