The civic center arena roof collapse is similar to the FIU pedestrian bridge collapse in that the engineers trusted their calculations over physical evidence of

The civic center arena roof collapse is similar to the FIU pedestrian bridge collapse in that the engineers trusted their calculations over physical evidence of imminent failure: > At 9 a.m. on March 15, a university employee heard a loud "whip cracking" sound while under the bridge span, waiting for a red traffic light. At the same time, the design-build team met for about two hours at the construction site to discuss the cracks discovered on March 13. Representatives from both FIU and FDOT were present. The FIGG lead engineer's conclusions were that the structural integrity of the bridge was not compromised and that there were no safety concerns raised by the presence of the crack. https://en.wikipedia.org/wiki/Florida_International_University_pedestrian_bridge_collapse https://en.wikipedia.org/wiki/Florida_International_Universi... Fortunately for NYC, when William LeMessurier received a phone call about Citicorp Center from a student, he went back and re-ran some calculations and realized that quartering winds would put his building under more stress than he originally realized. But no harm, that would be handled by the extra safety factor built into his calculations. Unless it turned out other changes had been made during construction he wasn't originally aware of. Well, I won't give away the whole story: http://people.duke.edu/~hpgavin/cee421/citicorp1.htm http://people.duke.edu/~hpgavin/cee421/citicorp1.htm http://www.engineersjournal.ie/2015/12/08/citicorp-centre-tower-failure-averted/ http://www.engineersjournal.ie/2015/12/08/citicorp-centre-to...