[TowerTalk] Twin Tower Engineering/Collapse

[Jim Reid]

Hi again,

For those interested,  here is a link with much more/better
info on the building design,  construction,  the "tube" 
explanation (I needed,  hi) and many comments by other
structrual engineers and firms.  Very complete and comprehensive
with many diagrams,  photos,  etc.  The internet truly is
a vast source of info!

The link:

http://www.civil.usyd.edu.au/wtc.htm

73,  Jim  KH7M


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