Locked Stairwells in the World Trade Center -- Criminal Negligence?
(c) 2001, Mike Barkley
[last updated 09/30/02 - I use minimal HTML to maximize your download speed]

Growing accumulation of WTC evacuation stairwell problems, including LOCKED DOOR horror stories, and barriers for people with disabilities

WTC, how many killed by Port Authority greed?

First letter to O'Reilly at Fox News

Second letter to O'Reilly at Fox News

Third letter to O'Reilly at Fox News

Letter to Newsday

Sixth posting to Design Community BBS

Seventh posting to Design Community BBS

FLOOR PLANS:

• http://www.hera.org.nz/PDF%20Files/World%20Trade%20Centre.pdf - a PDF file, an engineering analysis of the collapse includes one of four floor plans I've found showing the loction of the 4 (or 3) stairwells, see Fig. 5 in that file. Was the floor plan the same in both towers and on all floors?
• The , United States Fire Administration" report on 1993 bombing, shows 3 stairwells at PDF file p. 60.
• An Arup Group Ltd site, at PDF exhibit "A3 TYPICAL FLOOR PLATE" shows yet another configuration with 3 stairwells, sort of a combination of the above two, the clearest diagram on-line.
• USA Today at http://www.usatoday.com/news/attack/2001/12/19/usatcov-wtcsurvival.htm shows a layout similar to the U.S.F.A. in the click-on interactive graphic attached to this story.

For an alternative engineering view to the HERA report, see postings of and following that of Ngon Nguyen at http://www.DesignCommunity.com/discussion/7457.html and related postings including diagrams at http://www.DesignCommunity.com/discussion/7551.html for a discussion on possible failures of viscoelastic dampers as being crucial components in the tower collapses. See also the SurePlate discussions following http://www.designcommunity.com/discussion/12012.html and an interesting air pressure hypothesis from Ngon Nguyen at and following http://www.designcommunity.com/discussion/11729.html

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--Mike Barkley, 161 N. Sheridan Ave. #1, Manteca, CA 95336 (H) 209/823-4817
mjbarkl@inreach.com
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