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Originally posted by Griff
And how exactly did these 14 floors and 27 floors come crashing down on the floor below all at once?
If all I needed to do was to look at photos to have an explanation, I wouldn't be asking the question.
Originally posted by GenRadek
reply to post by turbofan
But you forget one important thing with the core columns:
They were never solid one pieces of steel 110floors high. They were segmented, connected together by bolts. There was plenty of evidence of bolts sheering apart, and the connections failing, not just beams snapping. You forgot this little part. Plus what will the connections do when thousands of tons of steel are already moving down on them?
Originally posted by pteridine
reply to post by Griff
Griff,
Iron spheres are not diagnostic for therm*te. If there is no aluminum present, there is no therm*te. If there is aluminum present, there MAY be thermite.
The properties of these chips were analyzed using optical microscopy, scanning electron microscopy (SEM), X-ray energy
dispersive spectroscopy (XEDS), and differential scanning calorimetry (DSC). The red material contains grains approximately
100 nm across which are largely iron oxide, while aluminum is contained in tiny plate-like structures. Separation
of components using methyl ethyl ketone demonstrated that elemental aluminum is present. The iron oxide and aluminum
are intimately mixed in the red material.
The chemical signatures found in the red layers
are also quite consistent (Fig. 7), each showing the presence
of aluminum (Al), silicon (Si), iron (Fe) and oxygen (O), and
a significant carbon (C) peak as well.
Do I need to explain all of this again?
I am generally patient with students but this is wearing thin.
Originally posted by GoodOlDave
Originally posted by Griff
And how exactly did these 14 floors and 27 floors come crashing down on the floor below all at once?
Well, gravity, obviously.
Originally posted by Griff
So, you are saying that the top cap became severed in some way? Because that's the only way all the load of all floors would happen at once. Is this what you are saying?
Care to explain how that happened?
Originally posted by GoodOlDave
No, this isn't what I'm saying. This is what every video of the collapse in existence says. It specifically shows the initial point of structural collapse began at the point of impact of the jets. Everythign below that point was stationary, and everything above that point started falling. I myself am merely pointing out what the videos are showing to you.
This is an irrefutable fact and it cannot be debated. Your not liking the fact does not in any way make it any less of a fact.
Seeing that the point of initial structural faulure began at the point of impact of the jets, it stands to reason that the structural failure was caused by some abnormal events instigated by the impact of the jets becuase the impact of the jets was in itself an abnormal event.
Originally posted by Griff
I am asking you how ''everything above that point started falling". What severed the columns to cause the top cap to descend as one unit?
So far you haven't answered me with anything but, "it just did".
I am not refuting it, I am asking you just exactly how it happened..
This is not true as I've stated before. Had the core columns been severed anywhere below the point of impact, the exterior would start to fail at it's weakest point....the impact zone.
Originally posted by GoodOlDave
However, I myself subscribe to the MIT report by Thomas Eagar,
Also, NIST fire engineer James Quintiere
states that his research shows there may have been insufficient fireproofing on the columns to protect them from that type of fire, which I find credible.
You are presuming that the core columns necessarily have to be severed in order for it to collapse. You forget the two alternatives- either the columns were weakened in such a way that they could no longer hold up the weight, or the weight increased to the point where it exceeded the structural load capacity of the columns. My money is on all three, and occurring in varying degrees.
But you forget one important thing with the core columns:
They were never solid one pieces of steel 110floors high. They were segmented, connected together by bolts. There was plenty of evidence of bolts sheering apart, and the connections failing, not just beams snapping. You forgot this little part. Plus what will the connections do when thousands of tons of steel are already moving down on them?
Originally posted by Griff
The same Thomas Eager who failed to include the core in his equations/theory? The same Thomas Eager who started the "pancake collapse" theory that has been debunked by NIST themselves?
The same Dr. Quintiere who states that he wishes the NIST report would be peer reviewed and doesn't agree with them?
I find it credible also. But, then we get back to the question of why the government is covering up this fact?
Since 47 core columns held 60% of the weight of the building and 84 exterior columns held 40% of the weight, it is a fair bet that the core had to collapse/sever in order for the buildings to begin their descent.
Originally posted by GenRadek
reply to post by GoodOlDave
Dave, I also recall that the engineers who investigated also said the beams experienced "creep" where the steel is sufficiently heated to where it is softer and begins to slowly deform due to the regular and extra loads its being exposed to. This was more noticed in the WTC7 of signs of creep in the structural beams. This would also account for the building's structural integrity failure the way it did.
Just before the fall of the North Tower, we saw a large explosion coming from the street-level area around World Trade Center 7. I remember thinking that it looked distinctly like a bomb had been detonated underneath the city, and, of course, that's exactly what I thought had occurred.
...the strange explosion I saw coming from Building 7 between the Tower collapses has never, to my knowledge, even been acknowledged by the city or the government.
Michael Hess, Sept 11, 2001
I walked down to the eighth floor where there was an explosion and we've been trapped on the eighth floor with smoke, thick smoke all around us for about an hour and a half.
Barry Jennings, Sept 11, 2001
...we made it to the eighth floor. Big explosion. Blew us back into the eighth floor, and I turned to Hess and said "this is it - we're dead".
Both staircases - the backside was completely blown away.
In every investigation I’ve taken part in, the key has been to establish a timeline. And the timeline is established by witness accounts, by information from alarm systems, by any video that you might have of the event, and then by calculations. And you try to put all of this together. And if your calculations are consistent with some of these hard facts, then perhaps you can have some comfort in the results of your calculations. I have not seen a timeline placed in the NIST report...
when anyone went to your advisory panel meetings or hearings, where they were given five minutes to make a statement; they could never ask any questions.
I didn't hear... any indication that it [WTC7] was going to come down and all of a sudden the radios exploded and everyone started screaming "get away, get away, get away from it"... It was at that moment... I looked up, and it was nothing I would ever imagine seeing in my life. The thing started peeling in on itself... Somebody grabbed my shoulder and I started running, and the #'s hitting the ground behind me, and the whole time you're hearing THOOM! THOOM! THOOM! THOOM! THOOM! I think I know an explosion when I hear it.
He goes over and he says you gotta stay behind this line because they're thinking about bringing the building down. They didn't say what building, they just said "bringing a building down". So we're like, "OK, we'll take their word for it, you know. We'll stay behind the line." He came back over with his hand over the radio and what sounded like a countdown and at the last few seconds he took his hand off and you heard 3, 2, 1 and he was just saying "just run for your life, run for your life" and then it was like another 2, 3 seconds you hear explosions, explosions like BABOOM! It's like a distinct sound, it's not like when, compression, like boom! boom! boom! boom! boom! like floors that were dropping and collapsing. This was BABOOM! Like you felt a rumble in the ground, like almost like you wanted to grab onto something. To me, I knew that was an explosion.
...the bottom floors of the building were on fire and... we heard this sound that sounded like a clap of thunder... turned around - we were shocked to see that the building was... well it looked like there was a shockwave ripping through the building and the windows all busted out... it was horrifying... about a second later the bottom floor caved out and the building followed after that.
The issue of thermate did not even reach, in our judgement, a level of importance sufficient in fact to do a detailed analysis. We could rule it out fairly easily for several reasons:
In order for a thermate reaction to take place, there has to be materials...
You would have had to place about 100 lbs of thermite right in proximity to the column and it had to have always adhered to the column...
At 4:38 p.m. all of the windows between 13-44A and 13-47C were open, and the fires responsible for opening the windows had died down to the point where they could no longer be observed. Just prior to the collapse of the building at 5:20:52 p.m. a jet of flames was pushed from windows in the same area. The event that caused this unusual behavior has not been identified.