Some Misunderstandings Related to WTC Collapse Analysis

[Tony Szamboti]

Jeffrey's diagram may underplay the damage to the core columns.

How many core columns do you suppose out of the 47 of them were severely damaged or severed in the North Tower?

Purdue took a shot at it:



[URL="http://www.youtube.com/watch?v=cddIgb1nGJ8"]http://www.youtube.com/watch?v=cddIgb1nGJ8
[/URL]

The Purdue simulation doesn't show things much different than what the NIST analysis shows. In both cases the wings never hit the core as they were shredded beforehand by the exterior and the floors outside of the core. Only the core columns in the center would have been hit with the fuselage at the 95th floor and 94th floor, as the impact was between the 95th and 96th floors with the aircraft pitched downwards at 10.6 degrees. NIST found no more than about 9 core columns would have been severely damaged and that was three stories below the initiation floor.

You don't seem to want to discuss how many core columns were actually damaged and where and why the core came down to begin with. The reality is that the core collapse at the 98th floor had nothing to do with the 9 core columns damaged in the center of the core three and four stories below. Just like the collapse starting at the south side exterior had nothing to do with the north face aircraft damage.

The real truth is it seems the aircraft impacts were nothing but causal ruses to make it appear as though they caused the collapse. The real reasons for the collapse involve why it started in the core just above the impact damage and on the south exterior.