>Jet fuel burns at 800 degrees
The temp that a given fuel burns it is dependent on how much air is mixed with it. The theoretical upper limit for medium fuel oil, such as jet fuel, is 3815F.
https://en.wikipedia.org/wiki/Adiabatic_flame_temperature
It would have no problem weakening the steel enough that the weight of the building above that point (heavier than the Titanic) would cause those floors to collapse. And dropping that much mass 13 feet…