- "... the NIST analysis used a fuel load that was too low and their fire durations are consequently too short...". So in his view NIST made mistakes regarding the length of time the fires had affected the structure.
- "An alternative hypothesis with the insulated trusses at the root cause (bolding mine) appears to have more support. Heat transfer analyses, a scale model, and the UL furnace tests all indicate that the steel trusses can attain temperatures corresponding to failure based on structural analyses...". So, in his view, even trusses that did not lose their spray on fire resistant material were susceptible to the effects of the fire.
What is he criticizing? Obviously, it's the conclusion that NIST drew about the conditions that caused the steel to fail. As can be seen in his own statements, Quintiere believes that the steel would have still been vulnerable
even with the fireproofing still intact. He comes out and says this ("...
with the insulated trussses at the root cause...", "... This hypothesis puts the blame on the insufficiency of the truss insulation. Something NIST says was not an issue.").
But what does this mean? It means he accepts that the fires were indeed at the heart of what caused the towers to fall. He not only doesn't challenge that, he treats that as a
given. What he does consider wrong are the conditions under which it all failed. And he wants NIST to submit their findings to other fire researchers and reevaluate whether the fireproofing was indeed sufficient. Read what he calls for:
Dr. James Quintiere said:
I would recommend that all records of the investigation be archived, that the NIST study be subject to a peer review, and that consideration be given to reopening this investigation to assure no lost fire safety issues.
... and look at what he's saying. Even if we take his conclusions all the way, what we and he would end up supporting is a re-evaluation of the evidence and working assumptions used to evaluate the evidence. Which is indeed a rather big deal - others here can go into more detail as to what that would entail - but the point is that such a re-evaluation does not call into question the fundamental narrative of impacts plus fires equal collapse. The fundamentals, the "givens" would still be that the collapse is due to the result of the fires on the damaged segments of the towers, and nothing else.