jaydeehess
Penultimate Amazing
Tour Broca was a 15 story structure in which 2 stories being pushed out resulted in a period of free fall for about about 13% of its hight.
WTC7 was a 47 story structure which expeanced a free fall equvanlt to 8 stories, which comes out to about 17% of its hight.
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So all you require is to be shown that there was a period of time, 2.5 seconds IIRC, during which there was a coincident destruction of up to 8 lower floors?
OK, the core area of the structure failed first. This is patently evident in the video as we see the top floor center of the structure begin to fall several seconds before the north facade begins its descent.
If you look at the construction of WTC 7 you will see that the 60-70% of width of the north facade above the 7th floor is being held up by 7 or 8 cantilever trusses that extend to the centeral core of the building. Take out the core columns that are supporting those cantilever trusses and the entire north facade has no support whatsoever. This is what can be expected to occur before the north facade comes down completely since it begins it descent well after the core.
Mystery solved?
It can also be noted that perhaps not coincidentally, much of the portion of the structure to the east of those cantilever trusses fell not to the south, but instead, to the northeast. It impacted 30 West Broadway so severly that it also had to be torn down.
the 'kink' in the building occurs just east of the eastern most cantilever truss and the roof structure descent progresses westward from that kink (ie. towards the support of those trusses)
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