triforcharity
Banned
- Joined
- Jun 23, 2009
- Messages
- 13,961
You fail to grasp the fact that NIST says the fire caused thermal expansion after it had gone out.
Read this again.
"According to NIST, the collapse began when the thermal expansion pushed the girder between columns 79 and 44 on the 13th floor off its seat."
The collapse began at 5:20 PM but the fire on floor 12 had gone out over one half hour earlier. Therefore, it did not cause the beams to expand to the point where they pushed the girder off its seat at 5:20 PM.
I figued out your problem. You think that the damage that started the collapse was ON floor 12. This is INCORRECT. Even the quote you keep posting says that the failure occured on the 13th floor. I've hilited the part you keep missing.
Now, does it say on the 12th floor? No, it doesn't. It says ON the 13th floor. ON the 13th floor, meaning the ceiling of the 13th floor.
