This presentation by Leroy Hulsey Ph.D., P. E., S.E. (Chair of the Civil and Environmental Engineering Dept.) is a culmination of a four year study of the collapse of the 47-story World Trade Center Building 7 (WTC7). The building (which fell at 5:20 P.M. on September 11, 2001) was a steel-frame office building located north of Vesey Street in the World Trade Center Complex in New York City’s Financial District.

The National Institute of Standards and Technology (NIST) released its final report on WTC 7 in 2008, finding that the fires that were ignited by falling debris from WTC 1 caused the collapse of WTC 7.

This UAF building failure analysis has concluded that fire did not bring down this building, yet the entire inner core of this building failed nearly simultaneously.