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Thu Sep 5, 2019, 04:17 PM

A Structural Reevaluation of the Collapse of World Trade Center 7 [View all]

"This is a study of the collapse of the 47-story World Trade Center Building 7 (WTC7) at 5:20 P.M. on September 11, 2001.

The objective of the study was threefold: (1) Examine the structural response of WTC 7 to fire loads that may have occurred on September 11, 2001; (2) Rule out scenarios that could not have caused the observed collapse; and (3) Identify types of failures and their locations that may have caused the total collapse to occur as observed."
http://ine.uaf.edu/wtc7

"The principal conclusion of our study is that fire did not cause the collapse of WTC 7 on 9/11, contrary to the conclusions of NIST and private engineering firms that studied the collapse. The secondary conclusion of our study is that the collapse of WTC 7 was a global failure involving the near-simultaneous failure of every column in the building."

http://ine.uaf.edu/media/222439/uaf_wtc7_draft_report_09-03-2019.pdf

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