July 11, 2007—A draft report explaining the collapse of World Trade Center 7 (WTC 7) should be released by the end of the year, according to the National Institute of Standards and Technology (NIST).
NIST’s investigation of WTC 7 includes an analysis that incorporates detailed information about the building’s structure and construction, as well as data about fires, damage sustained from falling WTC 1 debris and other technical factors to determine its probable collapse sequence.
WTC 7 was a 47-story office building adjacent to the WTC towers (WTC 1 and 2) that collapsed following the terrorist attacks of Sept. 11, 2001. WTC 7 collapsed later that afternoon.
The NIST investigation team initially worked simultaneously on both the WTC towers and WTC 7 collapses. In June 2004, the team shifted to full-time study of the towers to develop needed simulation methods and other research tools and to expedite completion of the WTC towers report. Work resumed on the WTC 7 study in October 2005.
For more information, see the NIST Web site.
