Charlie Bell wrote:
This chap has done some research and found a few cases of progressive
collapse in steel-frame high-rise buildings.
http://911myths.com/html/progressive_collapse.html
While none of these perfectly replicate the conditions at the WTC,
they do show that once the load exceeds the structural integrity,
progressive collapse is initiated.
So we've established that the fire was hot enough to initiate the
phase change in the steel (any heat over 600C), we've established that
there have been other cases of progressive collapse.
No, we may have established that 600C impacts on the strength of steel,
but we haven't established that the fire ever got that hot. How did we
demonstrate that?
I don't recall seeing much of a fire in the videos, mostly smoke (yea, I
know the saying :)), compare it to films of burning buildings, where you
actually see flames. And we had people standing in the holes the impact
made, looking out, and firefighters on the radio wandering past the
floor, maybe even on it, people going down the stairs through it, and in
lifts even. None of this seems like good evidence that a 600C fire was
burning on the floor.
And on that topic, why didn't we get a raging inferno at the Pentagon.
The plane had as much fuel, and no 70 stories for it to fall, yet we see
books on the side of the impact hole, un-scorched even. It seems odd we
get a steel warping fire in two crashes and barely a barbeque at the third.
And then there is the question of the hole in the Pentagon, or rather
the lack of a hole.
As for the Thermite: thermite is aluminium and iron oxide. If any of
the beams were exposed, which they would have been after a plane flew
through the central core, there may well have been rust about. We know
there was aluminium flowing through the buliding, as the planes were
made of it. It's entirely plausible that thermite reactions occurred
at places, and these may have caused additional weakening. However, I
think we've established that the heating of the steel beams to over
600C was probably sufficient to initiate collapse.
Apparently thats unlikely, and we would have seen thermite burning, even
through the smoke, but I dont know, one way or the other.
Have a wander round that 911myths site, it's not bad as he provides
pretty substantial references.
I am thanks.
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