I'm no expert by any means. Looking up briefly I see that jet turbines can get up to around 2000C/3500F give or take. Steel beam melting point is anywhere from 1375C+.
Fair enough.
But what about if jet fuel is not in a turbine? What if it's simply burning?
A pool fire (spill/open liquid fire) of jet fuel burns between 800C-1100C. Not enough to melt a standard beam.
The other point was that the pancake of the building was from the bottom, not from the top, where the fire would be.
Alright since you brought it up. My stance is that jet fuel CAN'T melt steel beams but they sure as hell can weaken them. However my own logic prevents me from accepting a bottom starting pancake collapse when the heat is at the top. Wouldn't that have been a top-down pancake at the very least?