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Originally posted by thematrix
Even if that were so, only where there was fire the steel would have been weakend to the point of loosing loadbearing capability, it doesn't explain at all how the building collapsed as if there was no steel or even concrete in the building at all.
It came down way to fast for that and the entire structure disintegrated and came down in a time period and at a speed CD specialists would be jealous about.
Originally posted by ANOK
The problem is how did the heat from a few fires, on just a few floors, heat ALL the steel up to 500c?
It's not as simple as you seem to think. The columns would have acted like heat syncs, taking the heat from the part being heated and spreading it along the whole length of the columns, thus cooling it.
Originally posted by bsbray11
reply to post by adam_zapple
Column failure theory is bogus anyway, even according to NIST. There was definitely not enough heat or time to sufficiently heat so much mass.