[blastawaycas]

i watched that too and just found myself yelling rubbish (but rhyming with bullship). i am an engineer by trade as well as a qualified health and safety officer, i get so annoyed when they mention about heat warping the steel beams resulting in the joints to break....lets just look at that "the joint" is in fact where the beams are bolted together, each beam has between 6 and 12 bolts holding it in place, when a beam bends it does not put any more stress on the bolts...only weight would do that ( radial load ) each bolt can take in a torqued up position ( a tightened bolt ) can withstand hundreds of tons of sheer (radial load) depending upon the diameter of the bolt which could be from 16 to 20 or more mm in diameter and several of them. furthermore concrete explodes (not in a bomb like fashion) more like crackles and pops over a 1000 deg c but when there is a huge quantity and the supposed high temp fires this would be heard like gunfire....no one has ever reported it, so i am doubtful of the reported inferno tempretures