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Originally posted by Gazzza
We'll never know.
Get over it.
Originally posted by pteridine
reply to post by EvilAxis
Your external source content ["You cannot crush an isotropic or composite 3-D structure A by a part C of itself (C = 1/10 A) by dropping part C on A using gravity. Part C either bounces on A or gets damaged in contact with A and is stopped by A that is also damaged a little. It is quite basic and all due to gravity. Materials, size and particulars of the elements of the structure A doesn't matter the least. Part C of A cannot destroy A."] is not an engineering rule of thumb or the result of engineering theory. It is the opinion of the author of the referenced work who is a marine engineer expert in ship collisions. It is also incorrect.
Originally posted by pteridine
reply to post by EvilAxis
The author is thinking about ship collisions and assumes that the top of the towers fell neatly on the bottom after dropping ten feet. He does not allow for additional structural damage due to fires, the rotation downward of the top section that would twist the structure or the failure of the relatively weak floor joists causing the strong external columns to detach and leave them and the core mutually unsupported.
It is understood that you believe WTC 1, 2 and 7 had unique structural features that caused them to be the only steel frame high-rises in history to implode but, as that isn't the topic of this thread, it could be considered a deliberate effort to derail.
Though it may sound vaguely plausible at first, there are a couple of problems with that theory. Firstly, if you watch the videos, you will not see a "descending juggernaut". The upper part of the building can be seen to explode outwards early in the descent, dissipating its mass away from the structure below.
Secondly, even if the upper part had continued to fall as a solid mass, its "force of weight" as you call it would be the same that the building had always supported, plus some momentum. Simply put - dropping a small steel box onto a larger heavier steel box will not cause the larger heavier steel box either to implode or be crushed to the ground.
Originally posted by EvilAxis
Now ask yourself why the tree always topples but never disintegrates from top to bottom into a pile of sawdust and sticks.
Originally posted by pteridine
What does a tree have to do with this?
Originally posted by GoodOlDave
Your "small box falling on a large box" example is a poor analogy, as any box weighing 4,000 tons is still going to crush the box beneath it regardless of how much the box beneath it weighs.
Originally posted by EvilAxis
However, the twin towers were very definitely not hollow. At their core were massive cross braced steel box-columns continuous for their entire height, from bedrock anchors in the sub-basements to near the towers' tops, where they transitioned to H-beams.
I asked for a counter example, but instead you simply repeated your assertion that this is what happens. If this is what happens, you should be able to demonstrate it empirically by providing an example.
Originally posted by GoodOlDave
You are falsely changing your definition of "hollow" in mid-analogy. I am using the dictionary's definition of "hollow" as "having an unfilled space in something". Each tower had somewhere upwards of 20,000 occupants EACH, so they were most definitely hollow, or at least, definitely more hollow than a tree would ever be. On the other hand, any tree which was truly hollow like the world trade center was certainly would collapse into twigs under its own weight becuase bark isn't load bearing.
Originally posted by GoodOlDave
Your analogy is flawed becuase you continue to presume the construction of the floors of the towers were box-like when they were not.
Originally posted by EvilAxis
Pteridine you are quite right. Absolutely no evidence, fantasy, only speculation, limited experience...
Thank you for your valuable contribution. ATS needs more like you.
Originally posted by pteridine
Axis,
Your claim of demolition with absolutely no evidence is the fantasy. You have only speculation and extrapolation of your limited experience which has your feelings saying "demolition."
Where is the evidence?