In article ,
"Mike Painter" wrote:

Toto the Dog wrote:
Each tower had 40 huge steel columns running up the centre. If the
booms you can hear during the collapse were the floors hitting each
other and not demolition charges why were these steel columns not left
standing but found at the debris pile in uniform 30 foot lengths? Why
weren't those columns standing after the floors had suposedly 'slid
down' around them?


Here's one of the columns:
http://img225.imageshack.us/img225/2...dcolumnfy6.jpg

That's a picture of something but please give us the pictures and
information on
a "debris pile in uniform 30 foot lengths"

As for the "huge steel columns"
"The unique structure of the WTC towers exaggerated the problems caused by
the weakened steel. The towers had a lightweight "perimeter tube" design
consisting of 244 exterior columns of 36 cm square steel box section on 100
cm centers, with 95% of the structure's interior consisting of nothing but
air Within this perimeter tube design there was a 27m by 40m core,
designed to provide additional support to the tower."

I don't consider 36 cm (less than 15 inches) huge in that context.




Maaybe it never occured to this Dufus, that these columns were built in
30Ft lengths and bolted together, or welded, as the building was
erected. Since these columns were all designed to be in "Compression",
when the lateral failure of the Exterior Tube happened, they would
naturally come out of compression, and break at their 30 Ft original
lengths. Duhh, this is first Year Structural Engineer stuff, but I guess
it would be beyound, the comprehension of the above, GED Dufus.......