since steel evaporates at around 2860C, clearly steel had gotten -much- hotter then 250C. And yet in Frank Gayle's report, he apparently dismissed any sample that had evidence of reaching temperatures above 250C. So tell me then, why did he dismiss all evidence of any steel sample evidence that was above 250C? After looking at Frank Gayle's report, I believe I see the answer:
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Fire model
•Detailed comparison with paint results underway•Model predicts temperature in Plate 3 (inner web) to be
maximum of 200-350 °C when fire proofing (1 3/16”) intact; Spandrels, with 0.5”fire proofing, maximum 450 °C
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http://wtc.nist.gov/media/P3MechanicalandMetAnalysisofSteel.pdf
So, if fire proofing was intact, the 'inner web' shouldn't have gotten much higher then 250C, 100C more at the most, with some spandrels getting up to 450. Temperatures of 3000C+ simply wouldn't have fit in with that model.