grandmastershek
Graduate Poster
- Joined
- Nov 2, 2009
- Messages
- 1,461
I refer to the final phase of the collapse when global collapse occurred. NIST describes as thus:
"The entire building above the buckled-column region then moved downward as a single unit, completing the global collapse sequence."
This was the upper 33 floors in case you've not read NCSTAR 1A
The buckled-column region they refer to is based on their hypothesis so could be true or might not be.
I see so your ignoring that the entire building didn't move as a single unit. Nice omission