Photonic writes "After three years of study, the subject statute of right and machinery (NIST) finally released its report on the crash of World Trade Center erection 7. The main conclusion is that the illustration came down due to fire, not due to debris damage or some connivance demolition team. The fire started pretty small after the or ruin.
fall of WTC 1, but was left to burn several floors out completely. The consequential finding is that the cave in was triggered by thermal protraction of beams, which could detach asymmetrically loaded girders from the main columns. Some limited pancaking of floors then caused a lack of lateral support and buckling of a single column. This triggered the failure of the entire core of the building, which finally fell down as a single piece. Crackpot superunified theory can be discussed elsewhere; please limit the congregation to the science here. All compilations can be found at NIST's WTC page, which read like a porn pulp* for finite element junkies. Simulation movies are also available. And yes, they used Beowulf clusters to do the simulations, some of which lasted for several months."

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Mark