Kryptos
Critical Thinker
- Joined
- Sep 7, 2006
- Messages
- 409
Not sure if anyone noticed that NIST released a status update for the WTC7 collapse investigation.
http://www.nist.gov/public_affairs/releases/wtc_062907.html
They expect to release a draft report for public comment by the end of the year.
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http://www.nist.gov/public_affairs/releases/wtc_062907.html
They expect to release a draft report for public comment by the end of the year.
[FONT=Arial, Helvetica, sans-serif][SIZE=-1][FONT=Arial, Helvetica, sans-serif][SIZE=-1]"We are proceeding as quickly as possible while rigorously testing and evaluating a wide range of scenarios to reach the most definitive conclusion possible," said Shyam Sunder, WTC lead investigator for NIST. "The WTC 7 investigation is in some respects just as challenging, if not more so, than the study of the towers. However, the current study does benefit greatly from the significant technological advances achieved and lessons learned from our work on the towers."[/SIZE][/FONT]
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[FONT=Arial, Helvetica, sans-serif][SIZE=-1]The current NIST working collapse hypothesis for WTC 7 is described in the June 2004 Progress Report on the Federal Building and Fire Safety Investigation of the World Trade Center Disaster (Volume 1, page 17, as well as Appendix L), as follows: [/SIZE][/FONT][FONT=Arial, Helvetica, sans-serif][SIZE=-1]An initial local failure occurred at the lower floors (below floor 13) of the building due to fire and/or debris induced structural damage of a critical column (the initiating event) which supported a large span floor bay with an area of about 2,000 square feet;[/SIZE][/FONT]
[FONT=Arial, Helvetica, sans-serif][SIZE=-1]Vertical progression of the initial local failure occurred up to the east penthouse, as the large floor bays were unable to redistribute the loads, bringing down the interior structure below the east penthouse; and [/SIZE][/FONT]
[FONT=Arial, Helvetica, sans-serif][SIZE=-1]Horizontal progression of the failure across the lower floors (in the region of floors 5 and 7, that were much thicker than the rest of the floors), triggered by damage due to the vertical failure, resulting in a disproportionate collapse of the entire structure.[/SIZE][/FONT]
JUST KIDDING! Had to get rid of that annoying message at the top telling me to "post something, you bum!" End of the year?