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Message - Re: WTC 7

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Posted by  Patrick J. McNierney on May 12, 2002 at 19:23:03:

In Reply to:  WTC 7 posted by Dammon on April 21, 2002 at 08:31:25:

Dammon,

Excellent question !!! Within 7 WTC, there were transfer trusses at the 4th and 11th floors. These trusses were supporting the columns up above ( to floor 48). Due to fire damage from debris falling on top of and adjacent to 7 WTC, these trusses gave way, thus resulting in a collapse of the upper floors.

Also, my article in the November 11 edition of Architecture discuss collateral damage to perimeter buildings and the condition of these buildings shortly after the disaster.

PMcN

 
 
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