When direct references have been made to sections of the reports you never addressed them leading me to conclude you had not read it.
If you have read it then you too know that no material from the impacted floors was used in the investigation. You also know that the report shows that the only way the NIST could get the fires hot enough to damage the steel was to speculate that the walls to the core were breached, conveniently, along the top half. Creating an air draft they could not show actually existed. That the fireproofing insulation applied to the steel was, again conveniently, removed from the steel at just the right locations. And the office furniture, amazingly, piled up right underneath the core wall breaches.
All rampant speculation with only video footage from outside the buildings providing for the basis for their hypothesis.
In fact, if you have read the reports, then you should realize that the experiments they conducted go a long was towards showing that those buildings could not have been brought down by airplane impacts and fire..not unless their hypothesized set of amazing and unproven events happened.