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Reply #124: do you realize how wildly you're misrepresenting that NIST letter? [View All]

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OnTheOtherHand Donating Member (1000+ posts) Send PM | Profile | Ignore Mon Nov-09-09 10:11 PM
Response to Reply #123
124. do you realize how wildly you're misrepresenting that NIST letter?
Quite possibly not, as most people who quote that part of a sentence don't put it in context.

In the case of the WTC Towers, NIST has established that the failures initiated in the floors affected by the aircraft impact damage and the ensuing fires resulted in the collapses of the towers. This conclusion is supported by large body of visual evidence collected by NIST. Your letter suggests that NIST should have used computer models to analyze the collapse of the towers. NIST carried its analysis to the point where the buildings reached global instability. At this point, because of the magnitude of the deflections and the numbers of failures occurring, the computer models are not able to converge on a solution.

Your letter contends that NIST's report violates the Information Quality Standard of "utility." NIST believes that the report has utility. In fact, the codes and standards bodies are already taking actions to improve building and fire codes and standards based on the findings of the WTC Investigation. As we mentioned previously, we are unable to provide a full explanation- of the total collapse....

...With respect to the second request for change, it was most critical for NIST to explain why the collapse initiated. Once the collapse initiated, it is clear from the available evidence that the building was unable to resist the falling mass of the upper stories of the towers....

Whether or not one construes that as "apply(ing) Bazant's theory," there isn't a heck of a lot of difference there. NIST is saying that it can't accurately simulate the collapses all the way down, not that it's unsure why the buildings collapsed.
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