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Merged New video! Architects and Engineers - Solving the Mystery of Building 7

Plus, in my defense, I was talking about after the east penthouse fell.


Of course you were; because that was a completely unrelated event, right? No, really... why would you exempt that aspect of the event from your challenge? Are you even aware of how dishonest that is? I'm sure you are...
 
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Zeuzzz said:
Watched this before. Reminds me something though, judging from the graph (that I think I'm right in thinking NIST has since agreed with?) it only took ~0.8 seconds for the building to accelerate from 0 to g, and then it maintains downwards acceleration of g for a further 2.5 seconds before any sort of resistance is reached. Correct? Want to check other people agree, mainly because the above graph is in a youtube video, before I presume its true.
Anyone?

Yeah, thereabouts. 0.8 seconds, or 1.0 seconds, whatever.
So?
Something significantly >0.0 seconds. Agreed?

What#s your question, and why would you ask that question?

0.8 seconds from 0 to g means that an energy amount of X was available and expended to buckle perimeter columns completely. Do you feel 0.8 seconds is not enough? If so, what do you base your feeling on? Math? Engineering? First-hand experience?
 
Merry Melodies doesnt even know what 7 was clad in.

Yet, with WTC7, not even a single brick was observed to drop until the start of global collapse.
MM

Well there ya go.

Show me the brick.
MM

http://en.wikipedia.org/wiki/7_World_Trade_Center
The original 7 World Trade Center was a 47-story building, designed by Emery Roth & Sons, with a red granite facade.

And even after it collapsed, A lot of granite was still attached to the curtain wall!

wtc7_debris-1.jpg
 
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Well there ya go.

Show me the brick.
Talking about bricks and thinking actual bricjs is moronic here, don't you think?

Plus, in my defense, I was talking about after the east penthouse fell.
Haha.
Right.
No brick fell before global collapse began - well I am talking of course about after all bricks fell.

What a masochistic and transparent excuse and evasion ;)

Time to get back to your paint chip obfuscation don't you think?
Wow. Youz moved that goal post by a thousand miles! Respect!!!





Can't you truthers ever admit you were plain wrong, and foolishly so? Do you really think you stand to gain anything by weaseling your way out oif this total embarrassment? How stupid do you think we must be? As stupid as yourself, maybe?
 
"Could you explain why not even a ripple was observed anywhere on the very visible
north side of WTC7?

Supposedly, inside girders and trusses were being pulled downward by massive gravitational forces. Girders, trusses and floor pans connected to the perimeter columns, windows, etc.

At least in their flawed hypothesis for explaining the collapse of the WTC Twin Towers, the NIST could show some bowing columns to support their argument."
"Incorrect*. Truther femr_2 produced a colour-adjusted video showing a distinct "ripple" down the N face of WTC7 prior to global collapse. Search his posts and you might even find it."

Since you are the one trying to counter my position Glenn, I suggest, if you have such proof to support your position, you get off your butt and show it. Its called put up or shut up.

"Yet, with WTC7, not even a single brick was observed to drop until the start of global collapse.

set3sccompositeua1.png


How much do you expect a person to suspend their disbelief?"
"Apart from the entire EMP? Oh dear. Then there's the "ripple" ....

Meanwhile, and strangely, there was a period of <g acceleration prior to the period of freefall. This doesn't tie in with any concept of all support being simultaneously removed, otherwise the acceleration would have been g from the outset.

*Nodding to Noah. I began composing this before cooking dinner, an hour ago ;)"

And it really shows Glenn. I pity anyone eating your dinner.

What ties in, is stage 2 of the collapse which the NIST described as; "Stage 2 (1.75 to 4.0 seconds): gravitational acceleration (free fall). During Stage 2, the north face descended essentially in free fall, indicating negligible support from the structure below. This is consistent with the structural analysis model which showed the exterior columns buckling and losing their capacity to support the loads from the structure above. In Stage 3, the acceleration decreased as the upper portion of the north face encountered increased resistance from the collapsed structure and the debris pile below."

MM
 
Yeah, thereabouts. 0.8 seconds, or 1.0 seconds, whatever.
So?


So? erm, because this is direct evidence related to the subject of this thread, isn't it?

Something significantly >0.0 seconds. Agreed?


Yes.

What#s your question


The one I asked.

and why would you ask that question?


To get an answer.

0.8 seconds from 0 to g means that an energy amount of X was available and expended to buckle perimeter columns completely. Do you feel 0.8 seconds is not enough? If so, what do you base your feeling on? Math? Engineering? First-hand experience?


Just perimeter columns? Are we presuming all internal columns had totally failed by this point?
 
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Since you are the one trying to counter my position Glenn, I suggest, if you have such proof to support your position, you get off your butt and show it. Its called put up or shut up.

:shakes head:

Unreal.


During Stage 2, the north face descended essentially in free fall,

You know another thing you dishonest truthers haven't done yet? Give us an example of another CD that did descend "essentially in freefall"....


why's that? Can't back up your claim that CD's the only way to get freefall?
 
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Do you feel 0.8 seconds is not enough? If so, what do you base your feeling on? Math? Engineering? First-hand experience?


It does seem quick. Definitely controlled demolition. I have A-levels in maths and mechanics, and a degree in physics. I'm pretty clueless about engineering.

That said, I think I've safely won this debate now by an awesome argument from authority. That authority being me.

That is all.
 
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Seriously though, I am having a dilemma about WTC7. I've tried to learn some of the basic engineering principles needed to understand the collapse recently thanks to some peoples help here. Pretty much given up now, was taking far too long and I don't have the time. If I do get the time I would love to try and learn some of it though. Although I know the basics I can only go down to simple physics type mechanics and ideal situations that lack an in depth engineering perspective.

So all I can really do for now is agree with which ever side of the argument the science published by engineers agrees with. Not so much on technical points but more on the way science works.

From scanning google scholar, omitting all non peer reviewed journals, considering citation numbers, comparing the quality and quantity of papers for and against; I have come to the conclusion that basically no respectable engineer that is doing science the way it should be done really thinks that WTC7 was a controlled demolition. If they do, I have yet to see such compelling evidence published in a reputable journal so it can receive valid criticism.

Nearly every point about WTC7 that I've seen brought up here supporting CD recently has had a counterpoint made. Although a lot of these points may be contentious, and lacking the direct evidence you usually get from science past theory, I don't think that parsimony puts much burden of proof on the official side when compared to the implications of what you would have to entertain if the opposing side was true.



Saying that, I'm still probably going to keep asking annoying questions out of curiosity for a bit here when i have the time :p
 
His target audience is anyone unafraid of the truth.

The Official Story rules because it provides sanctuary for those who fear the truth.

People much like yourself DGM.

MM

That is nothing the standard brainwashed cult response fed to you to protect the delusion. In reality nobody is afraid of the cult dogma you call truth. They simply don't believe you for valid and obvious reasons, like the fact that you are so delusional and brainwashed by the cult that you say things like this.
 
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Why would I fear "the truth"? What would knowing this profound truth do for or to me? Send me back screaming to mom's basement? What intestinal fortitude do truthers possess that they can deal with some knowledge apparently so horrific that it inspires them to post regularly on internet forums? I already post regularly on internet forums. How is it that I have no such fortitude?

How much worse can it get? Will I have trouble sleeping? I already have insomnia. Will I worry endlessly? I have two teenagers - I already do that. Will bad things happen to me? Been there done that. :eye-poppi

I wish someone could tell me what hell lurks for those who awaken to find that they are suddenly convinced that everything is a massive conspiracy that they are on the wrong side of.

Oh, wait...
 
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What ties in, is stage 2 of the collapse which the NIST described as; "Stage 2 (1.75 to 4.0 seconds): gravitational acceleration (free fall). During Stage 2, the north face descended essentially in free fall, indicating negligible support from the structure below. This is consistent with the structural analysis model which showed the exterior columns buckling and losing their capacity to support the loads from the structure above. In Stage 3, the acceleration decreased as the upper portion of the north face encountered increased resistance from the collapsed structure and the debris pile below."

You're missing the point, so let me rephrase it:

In your CD scenario
why is there a period of 1.75 seconds of < g acceleration, given that you claim instantaneous removal of all support is required to explain the g phase? What was happening in those 1.75 seconds?
 
So? erm, because this is direct evidence related to the subject of this thread, isn't it?
Yes, but what it means exactly we cannot know unless we now apply engineering, physics, math with actual numbers to it that describe the properties and behaviour of the actual steel structure.

Something no truther has ever done.
And yet truther repeat over and over again that the acceleration profile of the north face "means" CD. More specifically, most truthers insist that the acceleration profile with its period of about g "means" that "all perimeter columns must have been removed simultaneously" - something which is directly contradicted by the 0.8s of increasing acceleration.

But this engineering and math is something that NIST has done, and their conlcusion is that it fits reasonably well a scenario of progessive collapse that started with the fire-induces failure of floors around column 79. A conclusion that truthers simply hand-wave, without ever actually attacking it.

Yes.

The one I asked.

To get an answer.
Please try harder, and try to acknowledge that this focus on the single issue of acceleration profile and finding it suspicious or in need of answers is not something that you found yourself and could argue to be suspicious or singularly in need of being answered. Instead, you are following this path because truthers told you to. Yet they have not presented a complete argument that involves actual engineering and physics with actual numbers. So why do you ask us to debunk this incomplete argument, instead of demanding that truthers first make their argument complete (which they can't and won't)?

You'd do well at this point to notice that almost all truthers who want to convince you that the aceleration profil somehow "means" CD are either not aware of these 0.8s of <g, or ignore it, or even deny it.

Just perimeter columns? Are we presuming all internal columns had totally failed by this point?
We are presuming that yes the internal structure was alread completely in the process of going down. Doesn't have to be complete (as in freefall), it suffices if the internal core end of the floor spans were already moving down when the collapse of the north wall began. And we know this to be so because we can see in the same vidoes that truthers use for showing freefall that the east penthouse and the west penthouse had begun falling before the north wall did, which means the core was failing entirely from east to west.

Femr2 did a more precise acceleration profile than the one Chandler, and it reveals that during the period that had an average acceleration of about g, there were shorter sub-periods with acceleration slightly above g. The best explanation for this is what is already obvious from the videos: The core felll earlier than the perimeter, and pulled the perimter down via floor connections. A leverage effect that added some downward force in addition to the gravity exerted directly on the north wall.
 
Seriously though, I am having a dilemma about WTC7. I've tried to learn some of the basic engineering principles needed to understand the collapse recently thanks to some peoples help here. Pretty much given up now, was taking far too long and I don't have the time. If I do get the time I would love to try and learn some of it though. Although I know the basics I can only go down to simple physics type mechanics and ideal situations that lack an in depth engineering perspective.

So all I can really do for now is agree with which ever side of the argument the science published by engineers agrees with. Not so much on technical points but more on the way science works.

From scanning google scholar, omitting all non peer reviewed journals, considering citation numbers, comparing the quality and quantity of papers for and against; I have come to the conclusion that basically no respectable engineer that is doing science the way it should be done really thinks that WTC7 was a controlled demolition. If they do, I have yet to see such compelling evidence published in a reputable journal so it can receive valid criticism.

Nearly every point about WTC7 that I've seen brought up here supporting CD recently has had a counterpoint made. Although a lot of these points may be contentious, and lacking the direct evidence you usually get from science past theory, I don't think that parsimony puts much burden of proof on the official side when compared to the implications of what you would have to entertain if the opposing side was true.



Saying that, I'm still probably going to keep asking annoying questions out of curiosity for a bit here when i have the time :p

I think that's a reasonable enough position ;)
 
Watched this before. Reminds me something though, judging from the graph (that I think I'm right in thinking NIST has since agreed with?) it only took ~0.8 seconds for the building to accelerate from 0 to g, and then it maintains downwards acceleration of g for a further 2.5 seconds before any sort of resistance is reached. Correct? Want to check other people agree, mainly because the above graph is in a youtube video, before I presume its true.

You're losing track of your derivatives. The building isn't "accelerat(ing) from 0 to g", strictly speaking; its acceleration is increasing smoothly from zero to a value of zero to a value of 1G. Acceleration is the second derivative, whereas you're discussing the third derivative.

A perfectly reasonable explanation of this dependence of acceleration on time is: At the beginning of the perimeter collapse, the core structure has already failed, is falling inside the building, and is providing no support to the perimeter columns. The perimeter columns fail in an initial multi-storey buckle, in which the upper and lower plastic hinges are separated vertically by about eight storeys in height. (This is a very similar height to the unbraced length required for failure of column 79, which I suspect is no coincidence; the initial failure of the perimeter columns would be expected to occur over the same floors that were initially deprived of lateral support by the collapse of the floor beams that removed lateral bracing from the core.) Once the plastic hinges have fractured, there is no structure to provide resistance to the fall of the perimeter until the structure initialy at the top of the initial buckle meets the structure at the bottom of the initial buckle. At this point the acceleration decreases due to structural resistance.

The above is a simple explanation derived by a layman with a reasonable grasp of the physics involved, but no more. You say that "Nearly every point about WTC7 that I've seen brought up here supporting CD recently has had a counterpoint made," but I have yet to see any account even in this little detail that even establishes a plausible scenario in which explosive demolition could account for this acceleration profile.

Dave
 
Seriously though, I am having a dilemma about WTC7. I've tried to learn some of the basic engineering principles needed to understand the collapse recently thanks to some peoples help here. Pretty much given up now, was taking far too long and I don't have the time. If I do get the time I would love to try and learn some of it though. Although I know the basics I can only go down to simple physics type mechanics and ideal situations that lack an in depth engineering perspective.

So all I can really do for now is agree with which ever side of the argument the science published by engineers agrees with. Not so much on technical points but more on the way science works.

From scanning google scholar, omitting all non peer reviewed journals, considering citation numbers, comparing the quality and quantity of papers for and against; I have come to the conclusion that basically no respectable engineer that is doing science the way it should be done really thinks that WTC7 was a controlled demolition. If they do, I have yet to see such compelling evidence published in a reputable journal so it can receive valid criticism.

Nearly every point about WTC7 that I've seen brought up here supporting CD recently has had a counterpoint made. Although a lot of these points may be contentious, and lacking the direct evidence you usually get from science past theory, I don't think that parsimony puts much burden of proof on the official side when compared to the implications of what you would have to entertain if the opposing side was true.



Saying that, I'm still probably going to keep asking annoying questions out of curiosity for a bit here when i have the time :p

Take the CD theory one step further. Traditional CDs take months of prep time. Non essential building material is removed, building structures are cut / removed to the lowest safety factor in order to redue the amount of explosive required and to direct the way the building falls. It takes hundred of people, tons of man hours and tons of material to make it happen.

Now look at WTC 7. The building was occupied 24 / 7. The first group that would have to be in on the conspiracy would be the security guards, the union involved with the security personnel, and the security company. Next, nothing moves in Manhattan without union involvement. That would require the trucking unions be involved with the conspiracy. Next, nothing moves in a NYC skyscraper without both unions and building management involved. (You have to reserve freight elevators days in advance) Since the building was occupied, the work would have had to been down at night, now you have involved the cleaning crews, their unions and the companies they work for. Almost all the building columns were enclosed with finish materials, they would have to be removed and replaced to cover any planted explosives. Now you are involving various construction trades to repair those materials prior to the building occupants arriving in the morning. You also have to involve the building engineers and trades people and their unions since they would have to had been aware of something going on.

Next consider where all this material came from. The explosives, detonators, etc had to come from somewhere, that would have to be covered up, so now the supply companies are involved. Same with the replacement building materials (custom wall finishes and carpet cannot be just piked up at Home Depot)

Then afterward you have the involvement of the FBI, FEMA, the NYPD, FDNY, iron union workers and their unions, various volunteer rescue groups, etc. to cover up the evidence of a CD. After that you have groups like NIST, NFPA, various university engineering departments also involved.


This is the part that troofers new are able to explain. The conspiracy rapidly expands to THOUSANDS of people in order to maintain the secrets of the conspiracy.....for over TEN YEARS

In a country where TWO people could not keep one small medium stained blue dress a secret? :jaw-dropp



Troofers certainly live in an alternate reality :eye-poppi
 
A perfectly reasonable explanation of this dependence of acceleration on time is: At the beginning of the perimeter collapse, the core structure has already failed, is falling inside the building, and is providing no support to the perimeter columns.

Right, reasonable. The core fails inside the bldg and there is no indication given on the face of the building. Ok, if we can get past that for a moment, I might ask you for evidence for these assertions, but we know how that goes.
 
Right, reasonable. The core fails inside the bldg and there is no indication given on the face of the building. Ok, if we can get past that for a moment, I might ask you for evidence for these assertions, but we know how that goes.

The collapse video shows clear sky through the upper storey windows of the building, where the core has fallen below the level of those windows. It's therefore incorrect to say that there is no indication given on the face of the building; both the collapse of the penthouses and connecting screenwall, and the visibility of clear sky through the upper storey windows, are unambiguous indications that the core has collapsed.

Dave
 
Liars like yourself are usually the first to make that claim of others.

Unlike you, I do not knowingly tell lies, which is not to be taken as meaning I don't make the occasional factual mistake.

But again, unlike you, if someone shows me legitimate proof of a misstatement, I will attempt to make the proper correction.

MM

Liar, you have repeatedly lied on this forum and we have ample evidence that you just did so again.

http://www.internationalskeptics.com/forums/showthread.php?p=7703294&posted=1#post7703294

And you, as a proven liar, do not get to decide what is "legitimate" proof.
 
The collapse video shows clear sky through the upper storey windows of the building, where the core has fallen below the level of those windows. It's therefore incorrect to say that there is no indication given on the face of the building; both the collapse of the penthouses and connecting screenwall, and the visibility of clear sky through the upper storey windows, are unambiguous indications that the core has collapsed.

Dave

That sounds compelling on the face of it. Now, can I get a link, a screenshot or some reference to which image shows this.
 

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