The number is apparently what NIST was suggesting in its interim report
No that is what Ryan wanted to believe from reading the interim report. Their report from 2004 (is that the one we are talking about?) had estimates of temperatures far above 250C. Didn't they estimated pockets reaching 2000F very early on? Even the conspiracy theorists quote that one. Where do you get the idea that NIST don’t think the temperature went over 250C? Do you even know? You are just mindlessly repeating what Ryan said without even computing that the number was cherry picked from the steel tests.
The belief from the beginning was that the fire got very hot, near 1000C.
and was certainly a number that Kevin Ryan felt was reasonable.
Irrelevant. He is not an authority on the matter and is contradicted by those who are, and the supporting data.
He says as much in his letter to NIST's Frank Gayle:
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Your comments suggest that the steel was probably exposed to temperatures of only about 500F (250C), which is what one might expect from a thermodynamic analysis of the situation.
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http://www.sciforums.com/showpost.php?p=2090188&postcount=24
Yes keep spamming the same thing over and over. Spamming the same quotes repeatedly is not a substitute for an argument.
Yes, jet fuel burns up to 1500F/815C. I have it on good authority that the jet fuel fires played almost no role in the collapse of the World Trade Center.
Good authority? Lol. To say that they played no role in the collapse is a ridiculous statement. I have pointed out why to you several times but you will not digest anything that doesn’t come from conspiracy sites. It is your religion and your faith strong, while your mind is switched off.
Saying the jet fuel played no role is like saying jumping out of a plane without a parachute wont kill you. Sure hitting the ground at terminal velocity will kill you but jumping out of the plane wont. It is a lame attempt to misrepresent the truth.
The towers would have probably stayed up were it not for the jet fuel which started the massive fires over several floors. In previous high rise fires, the fire started slowly and worked its way from one office to another and then another floor to another over a long period of time. In WTC there was almost instantly a raging fire, over many floors. By the time the fuel was burnt out that place was an inferno with some of the steel unprotected.
You claim that the fires never went over 500F yet jet fuel burns up to three times that temperature!
Quoting Headspin:
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Wasn't the point of the cardigan tests to see how steel and building behaved at various temperatures, rather than to see what temperatures would be reached?
Weren't the Cardigan temperatures the input data, rather than the output data?
If i do tests at various temperatures, I cannot conclude the temperatures reached were those temperatures at some other fire event. What I can conclude is how the steel behaves at certain temperatures.
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http://www.sciforums.com/showpost.php?p=2083979&postcount=2240
Perhaps they were but one of the tests involved burning only wood and one test was a simulation for a burning office. These tests reached atmospheric temperatures near 1000C.
NIST performed their own tests to simulate office fires and the results were consistent with the Cardington ones.
As steel structure is not the same thing as saying a steel framed high rise.
A steel framed high rise is a steel structure.
No steel framed high rises have ever completely collapsed due to planes and/or fires alone before or since 9/11:
Every time you post that sentence my estimate of your IQ goes down a little more. Do you really think repeating that over and over means anything? Are you trying to make the case that anything that happens for the first time didn’t really happen? Do you even know what your point is here? I don’t think you do. Just repeating it over like a mantra for the gullible makes you feel better.
9/11 Research explains it thusly:
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Bowed Columns, or Refracted Light?
This illustration is in the slide presentations predating the Report, and is included in the final Report (p 33/83). NIST assigns inward displacements of every fifth column at each floor based on their appearance in the photograph.
A key part in NIST's theory of the collapse initiation is that the perimeter columns on one of the faces of each Tower bowed inward, pulled by sagging trusses. The Report contends that the columns on the south face of the North Tower bowed inward in the moments before its collapse and that the columns on the east face of the South Tower bowed inward some time before its collapse. As evidence for the supposed bowed columns NIST cites photographs. The Report includes one annotated photograph allegedly showing bowing in the North Tower, but no such photographs of allegedly bowing of columns in the South Tower. There are two photographs of alleged South Tower column bowing in an earlier slide presentation.
NIST fails to consider an alternative explanation for the bowed appearance of columns in its selected photographs of the Twin Towers: light refraction caused by the layer of hot air adjacent to the Towers. Such atmospheric conditions would refract light in a way that is consistent with apparent distortion of the columns seen in the photographs.
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http://911research.wtc7.net/essays/nist/index.html#bowed
I’ve already responded to this before and I can’t really be bothered anymore You don’t intend to actually think you just want to preach your religion. So I’m just going to cut and paste like you do.
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This is completely incorrect. For photographs of the degradation, the author refers Mr. Hoffman to NCSTAR1-3C and NCSTAR1-5A. Perimeter column bowing in WTC 1 appears in NCSTAR1-3C Figure 2-24 and 2-25, and NCSTAR 1-5A Figure 8-108. Bowing in WTC 2 is visible in NCSTAR1-3C Figure 2-37 and NCSTAR1-5A Figures 9-46, 9-59, 9-80, 9-82, and 9-83. A wealth of photographs also shows sagging of objects in the interior of both structures. Regarding Mr. Hoffman’s attempt to explain away these obvious signs of structural distress, the author notes that, had heated air refraction been to blame, the bowing would have appeared at slightly different locations from different vantage points, and many of the clearest photographs were taken from a moving helicopter. Convection also would
have created the appearance of bowing at other locations, rather than being restricted to precisely the same locations in both towers. Furthermore, such strong refractory effects would also necessarily include a great deal of turbulence, which would also be visible as a strong blurring effect, as is familiar to anyone who has ever seen a desert mirage. None of these photographs shows such a turbulent effect, and all of them are consistent with respect to the columns and floors affected. It is therefore Mr. Hoffman who is denying the clear signs of fire-induced structural weakness, and he does so with the flimsiest of excuses.”
R.Mackey