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The two 9/11 official reports (9/11 Commission and NIST) claim only that the heat of the jet fuel fires melted the core steel. They mention nothing about the impacts of the jets having any special status of being able to demolish the buildings. We know from the evidence of REAL towering infernos (in Madrid, Beijing etc.), where there were nothing but very hot FLAMES, not the extremely smoky, oxygen-starved (by definition) fires of the WTC jets' impacts, that core steel remains intact in the hottest possible fires.
Elsewhere on 9/11, meaning the Pentagon and (near) Shanksville, since when do planes vaporize when impacting an object or the ground?
Originally posted by Dean Goldberry
reply to post by Swampfox46_1999
Softened, melted. Whatever semantics. How would the entire structures have softened/melted, and so quickly, when the impacts would have affected only a few floors?
Where are there photos of anything more than a burned patch of grass at Shanksville, and anything resembling an entire plane at the Pentagon? Again, pixie dust, fairy tales.
Originally posted by GoodOlDave
1) NOWHERE in the 9/11 commission report did it document how the towers collapsed. It was to document who was responsible, how they did it, and how the US defenses responded.
OK, no biggie. Point is there's nothing that explains how they collapsed, which is the most vital area of the crime.
2) NOWHERE did NIST ever say the fires melted the steel. It said the fires heated the steel enough so that it lost its structural integrity and couldn't hold the weight load anymore.
Again, semantics. I'm not sweating the small stuff.
3) ... WTC had a radically different design...
Source, please, on that radically new tidbit. How can there be any significant variation in core steel columns?
4) Wreckage from the aircraft hitting the Pentagon WAS found inside, as well as bits and pieces lying all over the lawn.
Originally posted by GoodOlDave
3) The Madrid and Beijing skyscrapers were of a completely different design than the WTC towers. This is becuase the WTC had a radically different design which no other structure in the world had, except for each other. It was this unique design that was the main reason for the collapse.
4) Wreckage from the aircraft hitting the Pentagon WAS found inside, as well as bits and pieces lying all over the lawn. The thing flew right over a highway during rush hour, so hundreds of eyewitnesses say that it was a plane anyway.
disagree. This is the first I have heard that the WTC were designed so different than any other building in the world. gee.. I guess those hijackers were really smart to know they had such a terrible flaw that would make them collapse like they did. I just don't buy that at all. Where do you get your info on this please?
There should be holes in the sides of the building in the shape of a cross where the wings would impact the building. yet all we see is one big hole. ( and that hole is not even that big!) Not possible if it was an airplane that hit the Pentagon. We also know this from watching footage of plane crashes. Plus the grass and other surroundings would show damage and scorch marks were there is none in those pictures.
Lastly, The Plane that hit the pentagon is Very Heavy. its forward momentum would have carried it much further than this plane did wiping out half if not more of the whole pentagon. And yet conveniently the damage was confined to those areas already sealed off for construction work?
Originally posted by NibiruWarrior
The OP may be patchy and eggsageratory in his outline, but the facts remain. The steel could withstand 2x and possibly even 3x the temperature of the burning fuel from the planes.
Also, what about the explosions that were heard by A LOT OF CREDIBLE PEOPLE!
What about the precision Thermite-cut girders that were all over the wreckage and clearly visible in OFFICIAL photographs?
What about WTC7?
What about the COUNTLESS other evidences that this didn't happen the way they said?
Originally posted by hooper
Originally posted by Dean Goldberry
reply to post by Swampfox46_1999
Softened, melted. Whatever semantics. How would the entire structures have softened/melted, and so quickly, when the impacts would have affected only a few floors?
Where are there photos of anything more than a burned patch of grass at Shanksville, and anything resembling an entire plane at the Pentagon? Again, pixie dust, fairy tales.
Wow, for a guy wringing his hands about physics you take a pretty lax attitude when defining the state of matter. Maybe that is why you're sooooo upset about the seeming lack of physical credulity, you have no clue as to how the real world acts.
Originally posted by jprophet420
We know for a fact the steel melted as its in the FEMA report and we can physically see it in pictures.
Originally posted by RipCurl
Actually FEMA never confirmed it was steel
Melted the core steel? Pretty sure that isnt what they say, I believe it mentions that the temperatures caused the steel to soften to the point where it failed.
There continues to be a number of "experts" making public claims about how the WTC buildings fell. One such person, Dr. Hyman Brown from the WTC construction crew, claims that the buildings collapsed due to fires at 2000F melting the steel (1). He states "What caused the building to collapse is the airplane fuel ? burning at 2,000 degrees Fahrenheit. The steel in that five-floor area melts." Additionally, the newspaper that quotes him says "Just-released preliminary findings from a National Institute of Standards and Technology study of the World Trade Center collapse support Brown's theory."
We know that the steel components were certified to ASTM E119. The time temperature curves for this standard require the samples to be exposed to temperatures around 2000F for several hours. And as we all agree, the steel applied met those specifications. Additionally, I think we can all agree that even un-fireproofed steel will not melt until reaching red-hot temperatures of nearly 3000F (2). Why Dr. Brown would imply that 2000F would melt the high-grade steel used in those buildings makes no sense at all.
The results of your recently published metallurgical tests seem to clear things up (3), and support your team's August 2003 update as detailed by the Associated Press (4), in which you were ready to "rule out weak steel as a contributing factor in the collapse". The evaluation of paint deformation and spheroidization seem very straightforward, and you noted that the samples available were adequate for the investigation. 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.
However the summary of the new NIST report seems to ignore your findings, as it suggests that these low temperatures caused exposed bits of the building's steel core to "soften and buckle"(5). Additionally this summary states that the perimeter columns softened, yet your findings make clear that "most perimeter panels (157 of 160) saw no temperature above 250C". To soften steel for the purposes of forging, normally temperatures need to be above 1100C (6). However, this new summary report suggests that much lower temperatures were be able to not only soften the steel in a matter of minutes, but lead to rapid structural collapse.
This story just does not add up. If steel from those buildings did soften or melt, I?m sure we can all agree that this was certainly not due to jet fuel fires of any kind, let alone the briefly burning fires in those towers. That fact should be of great concern to all Americans. Alternatively, the contention that this steel did fail at temperatures around 250C suggests that the majority of deaths on 9/11 were due to a safety-related failure. That suggestion should be of great concern to my company.
Except, the airliners didnt vaporize. There are plenty of photos and witness accounts about the wreckage of both aircraft.
Originally posted by GoodOlDave
2) NOWHERE did NIST ever say the fires melted the steel. It said the fires heated the steel enough so that it lost its structural integrity and couldn't hold the weight load anymore.
3) The Madrid and Beijing skyscrapers were of a completely different design than the WTC towers. This is becuase the WTC had a radically different design which no other structure in the world had, except for each other. It was this unique design that was the main reason for the collapse.