[quote]nik133 wrote:
Sloth wrote:
nik133 wrote:
Great that still doesn’t answer why there were buildings closer to the towers that stood yet WTC 7 fell, besides there are many elements of demolition within the buildings pointed out in these Architects and Engineers videos here:
As for your NIST report, AE debunked it here:
Do you really believe that AE could find over 850 PROFESSIONAL Architects and Engineers to demand a new investigation if they felt it wasn’t necessary and that the first investigation was good enough?
Great picture. However, you do realize these buildings are mostly air, correct? That is, they’re volume is largely air. When untold tons are crashing down from above, as seen in your own picture, where do you expect that air to go? You ever push down a plunger in a syringe?
[i]BILL BUTLER, NEW YORK FIRE DEPARTMENT: We took two steps down from the fourth floor and the building started to shake.
SALVATORE D’AGOSTINO, NEW YORK FIRE DEPARTMENT: You could hear the floors pancaking one on top of the other, huge explosions.
LIM: Boom, boom, boom, boom, boom, and faster as they get closer. What I remember the most was the wind. It created almost like a hurricane-type force and actually pushed one of the firemen right by me.
MIKE MELDRUM, NEW YORK FIRE DEPARTMENT: I was flown down a flight of stairs, a little groggy for a while. I noticed somebody on a half landing just up from me, a few stairs and I thought it was one of our guys and it was David Lim.[/i]
http://transcripts.cnn.com/TRANSCRIPTS/0209/07/pitn.00.html
As far as the closer buildings…and? Distance from another building is now the key factor in why and how buildings collapse? The answer is because WTC 7 recieved sufficient damage and heat to collapse.
If the floors pancaked they would look like the picture I just posted, but no they were completely gone and the only thing that was left was dust and rubble. The only way this would happen is if there was explosives in the buildings and you still have yet to explain what all the reports of secondary explosions are? Remember the towers fell at near free fall speed and even if they did pancake, the core would stick through it like a pin through a deck of cards.
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The collapse wasn’t due to pancaking. Explain what the sounds of explosions are? Well, tons of crap falling, various things exploding in heat, and I know I’ve read the sound of bodies hiting the ground compared to explosions. Geeze, dust and rubble. Sounds like you expected the WTC towers to just accordion up on themselves. Seriously?
- How could the WTC towers collapse in only 11 seconds (WTC 1) and 9 seconds (WTC 2)â??speeds that approximate that of a ball dropped from similar height in a vacuum (with no air resistance)?
NIST estimated the elapsed times for the first exterior panels to strike the ground after the collapse initiated in each of the towers to be approximately 11 seconds for WTC 1 and approximately 9 seconds for WTC 2. These elapsed times were based on: (1) precise timing of the initiation of collapse from video evidence, and (2) ground motion (seismic) signals recorded at Palisades, N.Y., that also were precisely time-calibrated for wave transmission times from lower Manhattan (see NCSTAR 1-5A).
As documented in Section 6.14.4 of NIST NCSTAR 1, these collapse times show that:
â??â?¦ the structure below the level of collapse initiation offered minimal resistance to the falling building mass at and above the impact zone. The potential energy released by the downward movement of the large building mass far exceeded the capacity of the intact structure below to absorb that energy through energy of deformation.
Since the stories below the level of collapse initiation provided little resistance to the tremendous energy released by the falling building mass, the building section above came down essentially in free fall, as seen in videos. As the stories below sequentially failed, the falling mass increased, further increasing the demand on the floors below, which were unable to arrest the moving mass.â??
In other words, the momentum (which equals mass times velocity) of the 12 to 28 stories (WTC 1 and WTC 2, respectively) falling on the supporting structure below (which was designed to support only the static weight of the floors above and not any dynamic effects due to the downward momentum) so greatly exceeded the strength capacity of the structure below that it (the structure below) was unable to stop or even to slow the falling mass. The downward momentum felt by each successive lower floor was even larger due to the increasing mass.
From video evidence, significant portions of the cores of both buildings (roughly 60 stories of WTC 1 and 40 stories of WTC 2) are known to have stood 15 to 25 seconds after collapse initiation before they, too, began to collapse. Neither the duration of the seismic records nor video evidence (due to obstruction of view caused by debris clouds) are reliable indicators of the total time it took for each building to collapse completely.
