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Date: 2006-05-26 23:59:18Structural engineering 7 World Trade Center Progressive collapse Mechanical floor September 11 attacks Structural failure Truss Verizon Building Collapse of the World Trade Center World Trade Center New York City Architecture | UntitledAdd to Reading ListSource URL: 911research.wtc7.netDownload Document from Source WebsiteFile Size: 3,35 MBShare Document on Facebook |