Failure mode in WTC towers

My post was about audio. Care to address that before asking me random loaded questions?
Present your audio. BTW, people who were there that day do not agree with your implication that explosives, like RDX, TNT, caused the noises. You know you should take to people who witnessed the WTC1, 2, and 7 in person. It would cure your want to believe lies and fraud spread by idiots in the 9/11 truth movement. Research is the key; most have done some.

You have had 6 years to study this and you fail your first exam.
 
Newtons Bit, Realcddeal:

My post 722 is getting cold.


M-M-M-Max

Max, I don't see where you have a question for me. You paraphrased my position correctly in post 722. If you do have a question please state it.

I am wondering what sort of spin Newtons Bit will attempt to put on this now, other than the unsupported comments of derision he allows himself to make.
 
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On column moment

Max, I don't see where you have a question for me. You paraphrased my position correctly in post 722. If you do have a question please state it.

I am wondering what sort of spin Newtons Bit will attempt to put on this now, other than the unsupported comments of derision he allows himself to make.


Sorry realcddeal, I wasn't clear. The post was aimed at Newtons Bit, but he is being evasive, so I wanted you to feel free to comment.

Am I correct that column N7-N8 in Newtons Bit's diagram would be more representative of what you were discussing, than column N1-N2?
 
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Sorry realcddeal, I wasn't clear. The post was aimed at Newtons Bit, but he is being evasive, so I wanted you to feel free to comment.

Am I correct that column N7-N8 in Newtons Bit's diagram would be more representative of what you were discussing, than column N1-N2?

Yes. However, all of the columns in the towers would be considered sidesway inhibited. Newtons Bit says no, without much basis, as he doesn't consider the mass and inertia of the building to have an anchoring effect. I have shown the below link several times and the initial diagram NB showed was the upper portion DEHG which is not sidesway inhibited but is also not representative of the columns in the towers.

http://cnx.org/content/m10746/latest/

In addition, NB insists that the effective length factor can never be less than 1.0. It is obvious that that is conservative for design and using it in a failure analysis errs towards collapse initiation, by making the columns more susceptible to buckling. The link above shows that the effective length factors can be less than 1.0, when the columns are sidesway inhibited. NB never shows the sidesway inhibited nomograph and also tries to say that I don't understand that buckling will always occur. I agree that the buckling curve is asymptotic, but the effective length factors were less than 1.0 due to the end conditions being fixed-fixed, with sidesway inhibition. With this and, their actual length, moments of inertia, and cross section, the slenderness ratios of the tower columns were low enough to put them in the short column category, where their buckling stress was at or very close to the actual yield stress.

With the high factor of safety of the tower columns (3:00 to 1 for the core and 5:00 to 1 for the perimeter), damage due to aircraft impact limited to no more than 20% of the columns, and a lack of physical evidence of high steel temperatures, it seems collapse initiation due to fire was highly improbable.

In almost everything I see him do on this subject, Newtons Bit is erring in favor of collapse initiation and continuation. Maybe he is simply trying to convince himself, and others, that it could happen as advertised by NIST/Bazant without considering that something else may have been involved. That is fine but one cannot fudge the numbers to do that.
 
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Actually, I ignored Max Photon a long time ago, and I will not address his comments to me. I do sometimes make comments on what other people quote of him though.
 
Norseman asks:

What creates all the dust in this controlled implosion, detonations used to initiate the collapse or the gravity driven collapse of the building:
http://www.youtube.com/watch?v=-rcctmcxGwM

For those who didn´t look at this clip, please do. Norseman, you can´t find a better example of gravity driven ejections? But you do try and I appreciate that.

Can someone arguing the CD side please help these folks out a bit?

Max, to the degree that you suspect a model of gravity-driven collapse progression may be correct, your counter-arguments would be appreciated in order to take this debate to the next level.

If not I will have to create an imaginary alter ego persona to debate myself.

All quotes below are from Norseman. I have nothing personally against him and confess a certain fondness of him.

There is not any dust ejections missing any floors here.

?????

There is no piston inside that tower sealing off any thing.

I don´t think so either. The collapse front on the east side of WTC 2 just after collapse initiation is being lead by either the perimeter sections which are seen to fall within the lower "block" or the lowers flooring of the upper "block" (for those who believe in "blocks")

If flooring, then I guess the argument is that it acts like a piston (this is not my argument and nobody seem bold enough to state it explicitly, hence the guess).

Due to the obvious tilt of the building, the east edge of the piston is at a considerably lower elevation than the west edge. So in which direction is the compressed air more likely to be displaced, east or west?

And the upper block was tilting, you can calculate for yourself the horizontal distance between the exterior wall of the lower block and the broken off edge of the upper block on the east side of the tower.

You couldn´t be implying that it was the air in that little bit of spacing between these 2 sections that we see being forcefully ejected, are you?

Then you can think about how a corner office could delay dust ejections.

The point ejections witnessed along the corners? Corner offices which release their ejections noticably late than the rest of the floor? The case will much more difficult to argue for the corner ejections seen along the northwest corner, WTC 1, to be presented soon.

No one can give you a detailed account of exactly how the floors inside the towers broke up etc, it was a very chaotic event.

Chaotic is what I would also expect from a gravity driven collapse. But the floor-by-floor ejections witnessed imply an ORDER, not chaos.

"Even pancaking" is a silly theory used to describe the ORDER seen in the ejections leading the ejection front. More chaos, less ORDER.

The leading ejection front witnessed along east face appear horizontally along a particular floor at roughly the same time, though separated by distances of up to 200 feet. It is this order which forces people who believe in gravity driven collapse progression to suggest "pistons" and "pancaking" in the first place.

I have given you more than good enough explanations on a macro level here Major Tom.

Neither yourself nor anyone has.


A special note: Please notice how nobody is even bothering to "take the bait" by describing ejections witnessed along the east face of WTC 2 in terms of floor pancaking.

Any takers?
 
Major Tom and NIST FAQ 2007 #1

Major Tom,

Do you believe NIST FAQ 2007 #1?

1. Was there enough gravitational energy present in the World Trade Center Towers to cause the collapse of the intact floors below the impact floors? Why was the collapse of WTC 1 and 2 not arrested by the intact structure below the floors where columns first began to buckle?

Yes, there was more than enough gravitational load to cause the collapse of the floors below the level of collapse initiation in both WTC Towers. The vertical capacity of the connections supporting an intact floor below the level of collapse was adequate to carry the load of 11 additional floors if the load was applied gradually and 6 additional floors if the load was applied suddenly (as was the case). Since the number of floors above the approximate floor of collapse initiation exceeded six in each WTC Tower (12 and 29 floors, respectively), the floors below the level of collapse initiation were unable to resist the suddenly applied gravitational load from the upper floors of the buildings. Details of this finding are provided below:

Consider a typical floor immediately below the level of collapse initiation and conservatively assume that the floor is still supported on all columns (i.e., the columns below the intact floor did not buckle or peel-off due to the failure of the columns above). Consider further the truss seat connections between the primary floor trusses and the exterior wall columns or core columns. The individual connection capacities ranged from 94,000 lb to 395,000 lb, with a total vertical load capacity for the connections on a typical floor of 29,000,000 lb (See Section 5.2.4 of NIST NCSTAR 1-6C). The total floor area outside the core was approximately 31,000 ft2, and the average load on a floor under service conditions on September 11, 2001 was 80 lb/ft2. Thus, the total vertical load on a floor outside the core can be estimated by multiplying the floor area (31,000 ft2) by the gravitational load (80 lb/ft2), which yields 2,500,000 lb (this is a conservative load estimate since it ignores the weight contribution of the heavier mechanical floors at the top of each WTC Tower). By dividing the total vertical connection capacity (29,000,000 lb) of a floor by the total vertical load applied to the connections (2,500,000 lb), the number of floors that can be supported by an intact floor is calculated to be a total of 12 floors or 11 additional floors.

This simplified and conservative analysis indicates that the floor connections could have carried only a maximum of about 11 additional floors if the load from these floors were applied statically. Even this number is (conservatively) high, since the load from above the collapsing floor is being applied suddenly. Since the dynamic amplification factor for a suddenly applied load is 2, an intact floor below the level of collapse initiation could not have supported more than six floors. Since the number of floors above the level where the collapse initiated, exceeded 6 for both towers (12 for WTC 1 and 29 for WTC 2), neither tower could have arrested the progression of collapse once collapse initiated. In reality, the highest intact floor was about three (WTC 2) to six (WTC 1) floors below the level of collapse initiation. Thus, more than the 12 to 29 floors reported above actually loaded the intact floor suddenly.
 
Newtons Bit, post 722 by Max is getting cold. Would it be possible for you to address it?

Thanks.



Max, just noticed your post and I am on my way out the door. I'll answer it with the attention it deserves tomorrow. Bless your heart for the question.
 
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Newtons Bit, post 722 by Max is getting cold. Would it be possible for you to address it?

Thanks.



Max, just noticed your post and I am on my way out the door. I'll answer it with the attention it deserves tomorrow. Bless your heart for the question.

No. I don't feed the trolls.
 
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Newtons Bit et al. vs Realcddeal

Realcddeal,

Thanks for post 765. It's well written and helpful.

To my eye, the last round of the crew ganging up on you was LAMELAMELAME

Not very impressive guys.
 
Max asks:

Do you believe NIST FAQ 2007 #1?

1. Was there enough gravitational energy present in the World Trade Center Towers to cause the collapse of the intact floors below the impact floors? Why was the collapse of WTC 1 and 2 not arrested by the intact structure below the floors where columns first began to buckle?

Two questions are included.

Max, you have often mentioned that you believe NIST is telling the ambiguated truth. While I agree with you for the most part, I believe that other sleazy, slimy and deceptive debating methods were used within the reports, including:

Controlling the parameters of the debate. This is a method which gives the illusion that the debate is all-inclusive, while in reality they simply avoids addressing the correct questions in the first place.

The technique of controlling the parameters of the debate can be easily seen in the U.S. political process, but perhaps the most blatant example can be seen within popular media: The illusion of inclusive debate while simply ignoring the actual relevent questions that should be considered. This is a method of mind control of which I am sure you are aware.

By dominating the debate platform, carefully stacking the questions posed and simply ignoring the existence of anything that challenges the limited viewpoints one wishes to be discussed, you are assured of the answer you wish to hear before the debate begins.

Essential to this technique is the IGNORING of "unpleasant" questions and intelligent people whose mentality hasn´t been sufficiently shrunken to believe in such "puppet shows". These people are portrayed to basically not exist, and to the degree that they cannot be ignored, popular outlets of information distribution paint them as "nutty" and "fringe".


Max, you have an instinct for asking the right questions. This is why you must be portrayed as a "troll".


Now let´s consider the 2 questions posed in the NIST FAQ.

Why was the collapse of WTC 1 and 2 not arrested by the intact structure below the floors where columns first began to buckle?

Notice how an unproven assumption is inserted into the phrasing as if it is a known fact.

Where is it shown that column buckling was the cause of collapse initiation?

They are just "slippin' you the Willie" here, friend.


Let´s consider for a moment your statement that NIST is telling the ambiguated truth.

How does this "truth" manifest in the question above? How does your claim apply to the way NIST phrases the question?

I agree that NIST masterfully uses ambiguity, but other sleazy techniques of stacking the deck are being employed which don´t incorporate truth.

Was there enough gravitational energy present in the World Trade Center Towers to cause the collapse of the intact floors below the impact floors?

This is a method based more on trying to limit the reader's mental ability to ask the most relevent questions than ambiguating truth. The phrasing of the question forces the reader to answer "yes".

But dear Max, do you personally give a hoot whether an individual FLOOR can support all the FLOORS above it? The question as phrased implys the researchers attention should be focused on flooring. The question implies pancaking without ever explicitly saying it.


I have no problem with the answer given by NIST. But they already know the answer they will receive if a person "takes the bait" by agreeing that this is the proper QUESTION to be answered.

A more appropriate rephrasing of the second question would be:

Did column buckling cause collapse initiation? and If column buckling did cause collapse initiation, what caused the column buckling in the first place?


Of the first question would be:

Assuming collapse initiation, is a theory of floor pancaking consistent with that which was observed? If not, why do we (NIST) ask the public such deceptive questions as those appearing in our FAQ 1 in the first place?

Floor pancaking is not consistent with that which was observed, so why proceed to ask such loaded questions?


Max, a quick question for you: What does the technique of ambiguated truth have to do with the NIST FAQ question quoted above?

No need for me to say thanks to you. It is always implied in my posts.



NB, trolls? Your choking.
 
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Realcddeal,

Thanks for post 765. It's well written and helpful.

To my eye, the last round of the crew ganging up on you was LAMELAMELAME
Not very impressive guys.
OH, have your read his paper on this very topic? His paper makes most people's failures look like a success.
 
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Would collapse progression even need demolition assistance?

Major Tom,

A key question is, "Once collapse is initiated, how strong is the attractor of total collapse?"

It appears that the total collapse attractor is very strong.

NIST says getting a mere 6-storey block moving will bring about catastrophic collapse.

Bazant - Column God - sees a strong attractor.

When Apollo20 fiddles with his model, he finds that a broad range of input yields total collapse.

Architect has repeatedly made the excellent point that the towers were an integrated system, and when the system is compromised, complex load paths emerge that can bring about failure.

Anyway, the point is that if the towers were doomed once they got moving, then there is not much need for demolition assistance during collapse progression. So I'm just trying to get a sense if you believe the towers were doomed once they got moving.

Max
 
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Max asks:

Anyway, the point is that if the towers were doomed once they got moving, then there is not much need for demolition assistance during collapse progression. So I'm just trying to get a sense if you believe the towers were doomed once they got moving.

The logical flow of the arguments you mentioned go something like this:

Given collapse initiation,

1) It can be shown mathematically that total collapse is a fair possibility.

2) A broad range of input yields total collapse.

3) The towers were an integrated system, and when the system is compromised, complex load paths emerge that can bring about failure.


All good arguments. I have no problem with any of them. But my argument on the subject is just as good, and far superior when we move beyond mere theoretical possibility as ask ourselves what actually happened. It is summerized as follows:


Given collapse initiation, is gravity driven, unassisted collapse continuation consistent with that which was observed?



If you apply arguments 1, 2 and 3 as stated above to the question at hand, my question serves as a reality check to all theoretical arguments and is so essential to the process of trying to find the truth as to what actually happened that even the folks presenting arguments 1, 2 and 3 cannot fairly deny that it is a natural and just follow-up to any theoretical argument.

Without this follow-up their theoretical arguments will remain just that....theory.


It is undebunkable.



Generally stated:


a) Mathematically and logically, X is theortically possible and, some may argue, probable.

b) Is X consistent with that which we observe?


"a" lies only within the realm of thought. "b" is it's application.


Even scientific fields as mathematically complicated as the General Theory of Relativity or Relativistic Quantum Mechanics cannot ignore "b". No science can ignore "b".


"a" without "b", though it seems impressive, produces useless results.




The following curioso may help illustrate what I am talking about.




Curioso number 7: Forceful ejections witnessed from the northwest corner of WTC 1.

Please observe the following ejection patterns recorded along this corner.

http://www.youtube.com/watch?v=EZeaW4ybejs&feature=related


These ejections do exist. They are rather forceful.

From the point of view of gravity driven collapse, the options available to explain them are very limited: Trapped air is compressed within enclosed pockets near the corner of the building and violently forced out the windows with the velocities witnessed.

If perimeter sections and core columns are leading the wave of destruction, we won´t have these compressed, enclosed pockets.

This FORCES people explaining the observed phenomena in terms of gravity driven collapse into claiming that condensed, intact flooring acting as a piston is responsible for these ejections.


If you recall, curioso number 4 uses the following BBC video clip of the same corner and the southwest corner to state that similar ejections recorded along the southwest corner lead these ejections by 10 to 20 floors.

http://www.youtube.com/watch?v=k-jYSy1SxsI



Heavy objects falling through floors, leading the collapse front is inherently inconsistent with "pancaking" or "piston theory".

The southwest corner destruction front leading the northwest corner front by 10 to 20 stories means that the very floors that are needed to act like a piston in these corners and along the west facade, forcing down on compressed, enclosed pockets of air are shredded. The "piston" is not a solid, intact object. It doesn´t exist.


Corner pistons?


Were the towers doomed once they got moving? Perhaps and perhaps not.

Is gravity driven collapse continuation consistent with that which was observed? With all the features of the collapses which I am pointing out? No.

Notice how many people never follow up on their theories with this second question.

Einstein did. Dirak did. Planck did. Maxwell did. And their work was of a much more theoretical nature. But many folks studying the collapses don´t feel the need.
 
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Were the towers doomed once they got moving? Perhaps and perhaps not.
Is gravity driven collapse continuation consistent with that which was observed? With all the features of the collapses which I am pointing out? No.

Argument from incredulity

This isn't a theory, that's why no one has followed up. That's why no one will follow up, and that's why this whole thing called the truth movement is a joke. Don't get me wrong, this is some first class hand waving, but it's hand waving. Eventually you'll see this.

The truth movement is like a lame phoenix flapping its wings but never gets out of the ashes.
 
You couldn´t be implying that it was the air in that little bit of spacing between these 2 sections that we see being forcefully ejected, are you?

No, it was just another way of telling you that nothing was sealed off while the upper block crushed the floors in the lower block. Just to clear this detail up for you.

And again, there is nothing more to discuss here Major Tom. All the pictures and the videos you have presented supports the very fact that the towers collapsed due to aircraft impact and fire weakening the structure. And I am not going to waste more time trying to explain every tiny detail to you.

Remember nearly 15 000 cubic meters of air on each floor.
 
The truth movement is like a lame phoenix flapping its wings but never gets out of the ashes.

Or like the Black Knight in the movie Monty Python and the Holy Grail who did not understand when it was the time to quit the fight, sitting on the ground with both his arms and legs cut off going nowhere, screaming for King Arthur to come back, so that he can bite King Arthur's legs off.
 

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