The History Channel occasionally runs its 9/11 special. IIRC their conclusion was that the heat caused the structural beams to sag, pulling away from the anchors and thus causing the floors to pancake on top of each other. At a sufficient weight the lower floors were no longer able to support the weight...
Damon. ------------------------------------------------------------ Damon Agretto [EMAIL PROTECTED] "Qui desiderat pacem, praeparet bellum." http://www.geocities.com/garrand.geo/index.html Now Building: Trumpeter's Marder I auf GW 38(h) Sent from my BlackBerry wireless handheld. ------------------------------------------------------------ Sent from my BlackBerry wireless handheld. -----Original Message----- From: Charlie Bell <[EMAIL PROTECTED]> Date: Thu, 29 Jun 2006 21:54:38 To:Killer Bs Discussion <[email protected]> Subject: Re: Physics Prof Finds Thermate in WTC Physical Samples On 29/06/2006, at 9:18 PM, Gibson Jonathan wrote: > I do believe the soft-butter theory could have some merit and look > forward to real studies we can sink teeth into and chew properly. > As I understand it Underwriters Labs put the original steel, and > debris samples, under 2,000° for several hours without deformity I take it you mean 2000F, around 1100C. You can heat steel to that temperature, it will not melt or deform. What it does do is become about half as strong, and will bend, stretch and fail if it's structural. Not to forget that a lot of the central support had just had a plane fly into it. > I have yet to see a model - or even discussion - on how such metal > is a renowned heat wick and just how this would have mitigated > total systemic collapse... unless the argument is that this > apparently minimal heat was X-ferred down the entire skeleton > structure... leading to the "Soft Butter" support member lack of > resistance that allowed the entire building to fall at damn-near > free-fall speeds - all at once. It didn't collapse all at once. It was jackhammered floor by floor. it only needed the top 1/4 of the building to start collapsing to crush the rest. I'm amazed that this is at all mysterious. Charlie_______________________________________________ http://www.mccmedia.com/mailman/listinfo/brin-l
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