How did they fail and "slip" in the first place... Here's my earlier interaction with econ41 on this question:even after it slipped past the initial columns that failed
Me: But you need to get the columns disconnected and moving in the first place, so the missing can take place, no?
Apparently, "few people" have even considered such a "key issue".econ41: Yes, And, surprisingly, that is the key issue that few people have looked at or considered seriously.
Maybe you can explain what you think happened to me... So when the plane impacted, sure, some core columns were cut or otherwise massively damaged. But I think it's fair to say that out of 47 core columns, the majority were still standing fine. The top block did not budge on impact, or start visibly sagging one way or another. Then you've got the jet fuel, but it burned off in a few minutes, which I sourced earlier with a quote from Sunder and from the NIST report. The jet fuel ignited office combustibles however, which were what was burning until the tower collapsed. But obviously, the office combustibles were in the office spaces, outside the core. I doubt there were much combustibles in the stairs and elevator shafts in the core. So while the air would certainly get very hot in the burning floors, the flames were not like pressed up against the core columns, especially the ones in the center. So how did they get hot enough to fail? Or are you still going to say they failed after losing lateral support from the floors, although FEMA observed the core failed first?