Originally Posted by
Criteria
WTC 7 had 58 perimeter columns and 25 core columns.
Freefall as observed in the video record showed the NE corner dropping in sync with the SW and NW corners. 83 columns do not ’snap’ at the same time unless they all face an overwhelming lateral or vertical force at the same time.
They didn't. Core fell first, so about 58 failed at about the same time (or about 21 if we follow JSanderO's explanation). And FTFY, see
https://www.youtube.com/watch?v=Bgucy_b5FKk for an example of simultaneous or near-simultaneous failure due to vertical overload.
The core pulled from the perimeter as it fell, causing it to overload and causing the "kink" (which is mostly north-south and a little up-down). Pretty basic.
Originally Posted by
Criteria
There is nothing desperate about arguing that CD was the cause. It is the only logical explanation.
There's
flawed logic in your 'logical' explanation.