Probably didn't make any difference. The asbestos containing insulation isn't that much better at slowing heat transfer, and that's the real problem. After 45 minutes of roasting, the structure failed, most likely due to a combination of differential thermal expansion ripping the floor beams off their attachments and overloading the floors below and pushing/pulling the exterior walls out of vertical enough to fail them.
The only real design failure/construction failure was using drywall instead of poured concrete for the stairs. If that had been done, far fewer people would have been trapped up top by impassable stairwells. The stairwells are too small, too, but that was code, not something easily changed. Peter On Jun 30, 2008, at 9:31 PM, Craig McCluskey wrote: > On Mon, 30 Jun 2008 18:13:04 -0500 Peter Frederick > <[EMAIL PROTECTED]> > wrote: > >> Yeah, that's one of the problems with the WTC -- that coating is not >> strong enough to withstand an air/diesel fuel explosion, so likely >> there wasn't much heat protection, quite aside from the asbestos. >> Turns out to be fairly difficult to get a coating that's insulating >> enough and hard enough at the same time! > > And not only that, the people who were building the WTC were forced to > change the formulation of the fire-proofing about half-way up > because of > environmental considerations (i.e., they could not use asbestos). > > > Craig > > _______________________________________ > http://www.okiebenz.com > For new parts see official list sponsor: http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
