Some Misunderstandings Related to WTC Collapse Analysis

[Tony Szamboti]

You have it right about there not being enough heat to cause what we observed. The NIST didn't find evidence of high temperatures on the steel. They only found three pieces out of the 236 they got from the twin towers that had even seen temperatures beyond 250 degrees C, where steel hasn't even begun to lose strength.

You ignore the building motion pre release which indicated the core had begun to collapse, fail and the motion led to lateral motion and fracturing of column connections. You don't know the temps and where they were applied and you've made up the facts to suit your theory. The link provided explains the flaws in your thinking.

Ed De Paolo examined the steel and stated the heat destroyed the strength of the steel. I suggest you take it up with him not me. I can give you his contact info or look it up yourself - Severud Associates.

So now you want to say a vertical drop of the core caused a large side to side motion that fractured perimeter connections. How did the core drop and why would it cause a large horizontal motion? Additionally, if the perimeter connections were so susceptible to horizontal motion the wind resistance of the design would not have been nearly what the designers purported it to be.

The chief engineer John Skilling is on record explaining to authors Glanz and Lipton

The Vierendeel trusses would be so effective, according to the engineers' calculations, that all the columns on one side of a tower could be cut, as well as the two corners and several columns on the adjacent sides, and the tower would still be strong enough to withstand a 100-mile-per-hour wind. --City in the Sky, p 133

It is obvious that you still can't provide a plausible mechanism for heat weakening causing the rapid horizontal propagation (the NE corner 300 feet away fell within 0.7 seconds of the SW corner) and the constant and rapid (5.1 m/s^2 or 17 feet/s^2) vertical acceleration of the first story of the collapse of the North tower at the 98th floor.

Maybe you can show us some of your cartoons you say you use for understanding and we can see why you can't explain things.