On Tue, Jan 17, 2017 at 11:28 PM, Razer <g2s@riseup.net> wrote:
Metals weaken significantly and permanently long before they ever reach melting point.
Of course, that obvious engineering should be considered... any degree of heat causes progressive degree of weakness in metals and other materials such as concrete. The links in this thread should direct science not bogus armchair analysis. Ref color temperature vs. 8x'th floor liquid flow out the windows and ground zero glowing/dripping/molten excavations. And evaluation as to 'secondary explosions' and 'liquid glowing metal'. That will be hard to prove out without investigation and non-leading interviews, let alone 15 years later. Respecting those evidences, really don't have opinion on that, or time. And frankly, once initiated, tubular pancaking makes physical science sense. It's the initiate that people question. Was the basement structure / etc cut? If the 'lobby' blew, why didn't floors 2, 3, 5, 10... etc. I've no idea, you decide.