Originally Posted by Scootermuze

Do you mean these guys?

NIST contracted with Underwriters Laboratories, Inc. to conduct tests to obtain information on the fire endurance of trusses like those in the WTC towers?. All four test specimens sustained the maximum design load for approximately 2 hours without collapsing? The Investigation Team was cautious about using these results directly in the formulation of collapse hypotheses. In addition to the scaling issues raised by the test results, the fires in the towers on September 11, and the resulting exposure of the floor systems, were substantially different from the conditions in the test furnaces. Nonetheless, the [empirical test] results established that this type of assembly was capable of sustaining a large gravity load, without collapsing, for a substantial period of time relative to the duration of the fires in any given location on September 11. (NIST, 2005, p. 141; emphasis added.)

Or this guy?

Kevin Ryan, the whistleblower from Underwriters Laboratories, did his own statistical analysis in a recent letter regarding the NIST report, arguing that probabilities of collapse-initiation needed to be calculated (Ryan, 2005). NIST nowhere provides such a likelihood analysis for their non-explosive collapse model. Ryan?s analysis is that the probability that fires and damage (the ?official theory?) could cause the Towers complete collapse is less than one in a trillion, and the probability is much less still when the complete collapse of WTC7 is included (Ryan, 2005). Nor does NIST (or FEMA or the 9-11 Commission) even mention the molten metals found in the basements of all three buildings (WTC 1, 2 and 7).