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911 evidence - Page 5

post #201 of 470
Quote:
Originally Posted by yt View Post
you have to also understand that I don't trust the government or media to tell the truth.
But dont you think that going in completely the opposite direction can be as limiting to an objective perspective as someone who blindly accepts everything the government and media tell them? Aren't you leaving yourself open to being just as blinkered as a consequence?

'A lie is best hidden between two truths'? That sort of thing?

Does it ever scare you that no matter what you find out, what you read and who you talk to, you may simply never know the honest-to-goodness exact truth with things like this? Or that what you may percieve as the trutyh of something may simply be your perception of it anyway?

It took me a long time to come to terms with that, that I will probably simply never know the actual answers to a lot of the questions I've seeked in the past.
post #202 of 470
Quote:


"Fire has never done this to steel. But a thermite incendiary cutter charge does. The byproduct of thermite is molten iron. The byproduct of thousands of thermite cutter charges is tons of molten iron — as witnessed by numerous NYFD personnel and the WTC Structural Engineer, Leslie Robertson."

That picture looks like a piece of steel that was twisted, bent, torn apart. It doesn't look like it was "melted". Could the force of twisting the metal heated it up a bit and softened it somewhat? ? I'm not an expert, but just take a paperclip and bend it back and forth many times, and see how amazingly hot it gets. Nevertheless That piece is all jagged like it was torn apart while NOT in a molten state.



"Previously molten metal was found "flowing like lava" by the FDNY in the basements of all 3 WTC High-rises. Hydrocarbon fires can burn at a maximum temperature of 1,800°F which is about 1,000° short of the beginning melting temperature of steel. Where did the molten metal come from? Why do FEMA and NIST deny its existence?"

Where is the source for this "Metal flowing like lava" quote? I've only found references to newspapers talking about steel "melting" prior to the collapse, but it only seems to be referring to theories about what CAUSED the collapse, not actual rivers of molten steel. The newspapers were likely just "melt" to describe the softening of steel, as opposed to it truly liquifying, using the term inaccurately.


"The 20 to 50 ton steel columns & beams were broken apart at welded connections and ejected laterally up to 500 feet."

So what? They were being crushed by the weight of an incredible amount of material descending upon them.



"Numerous Squibs (mis-timed explosions) can be seen seen 20 to 40 floors ahead of the advancing "collapse". NIST claims that they are "puffs of air" created from the pancaking floors above. But there are no pancaking floors above, they are not air but pulverized building materials, they occur precisely at the center of the building in an "open office plan", and finally, the 160 to 200 feet per second speed of this debris suggests they could only have been propelled by explosives."

The air from building materials being pulverized as the floors pancake on top of eachother is, yes, going to be full of pulverized building material, and is going to be forced downwards explosively. And that picture shows ONE puff blowing out of one window in the floors below. How does that jibe with a "controlled demolition", which would have all the charges go off at once? And where on earth is it a "fact" that nothing can propel material as fast as a controlled demolition? That's like saying "No one can throw a baseball faster then a firecracker's explosion can". The compressed air from the pancaking floors above is forced down into the air-conditioned (and externally sealed) office floors, building up pressure, which causes SOME windows to blow out. It's kind of what happens when you press down on the handle of your bicicle pump. The handle may be way back, but air is still forced out of the air hose far away from the handle.

I hope you respond to this, because otherwise I feel you are not doing me the courtesy of having an actual conversation with me. Posting endless links and quotes from the Internet is not engaging in conversation, and it forces other people to do all the work and thinking for you. Please respond to these points here. Please to not cut and paste more photos and links.
post #203 of 470
Someone needs to learn to use the quote function methinks...
post #204 of 470
Quote:
Originally Posted by NoDiggity View Post
Where is the source for this "Metal flowing like lava" quote? I've only found references to newspapers talking about steel "melting" prior to the collapse, but it only seems to be referring to theories about what CAUSED the collapse, not actual rivers of molten steel. The newspapers were likely just "melt" to describe the softening of steel, as opposed to it truly liquifying, using the term inaccurately.
No, there was molten metal at ground zero, this is true. There are pictures out there. Don't feel like diggin it up, but suffice to say this doesn't in anyway support any sort of controlled demolition theory, the temperatures at ground zero were incredibly hot and the "pools of molten metal" were created in the days after the collapse.

And sorry for the rant earlier guys...but to me it's just very depressing to see that so many people freely give up their rights in this country because of some sort of insane loyalty to leadership, so many people vote against their interests and for the most part it feels like we're all just too distracted to fix anything about this mess that we're in.

Calling people retards for believing in something you think is crazy isn't helping. Remember that we live in a country where half the population believes that Jesus will literally return to Earth in the flesh and will do so very soon, and a hefty amount of those people also believe that after alot of crazy shit goes down that they will be magically teleported to heaven and then later on everything will be made new and we'll all enjoy a nice life of leisure with our brand new perfect bodies in beautiful Jesusland on Planet USA.

So think about that before you start calling anyone crazy. Because that's not helping us make any progress.
post #205 of 470
Thread Starter 
Quote:
Originally Posted by The Rain Dog View Post
But dont you think that going in completely the opposite direction can be as limiting to an objective perspective as someone who blindly accepts everything the government and media tell them? Aren't you leaving yourself open to being just as blinkered as a consequence?

'A lie is best hidden between two truths'? That sort of thing?

Does it ever scare you that no matter what you find out, what you read and who you talk to, you may simply never know the honest-to-goodness exact truth with things like this? Or that what you may percieve as the trutyh of something may simply be your perception of it anyway?

It took me a long time to come to terms with that, that I will probably simply never know the actual answers to a lot of the questions I've seeked in the past.
Yeah, well aware of this.

Quote:
Originally Posted by NoDiggity
That picture looks like a piece of steel that was twisted, bent, torn apart. It doesn't look like it was "melted". Could the force of twisting the metal heated it up a bit and softened it somewhat? ? I'm not an expert, but just take a paperclip and bend it back and forth many times, and see how amazingly hot it gets. Nevertheless That piece is all jagged like it was torn apart while NOT in a molten state.
I don't know. But is there enough of a question to warrant tests of some kind?

Quote:
Originally Posted by NoDiggity
Where is the source for this "Metal flowing like lava" quote? I've only found references to newspapers talking about steel "melting" prior to the collapse, but it only seems to be referring to theories about what CAUSED the collapse, not actual rivers of molten steel. The newspapers were likely just "melt" to describe the softening of steel, as opposed to it truly liquifying, using the term inaccurately.
If you watch the first documentary I linked to, there were numerous eyewitnesses to this.

Quote:
Originally Posted by NoDiggity
"The 20 to 50 ton steel columns & beams were broken apart at welded connections and ejected laterally up to 500 feet."

So what? They were being crushed by the weight of an incredible amount of material descending upon them.
Merely pointing out that some scientists disagree.

Quote:
Originally Posted by NoDiggity
"The air from building materials being pulverized as the floors pancake on top of eachother is, yes, going to be full of pulverized building material, and is going to be forced downwards explosively. And that picture shows ONE puff blowing out of one window in the floors below. How does that jibe with a "controlled demolition", which would have all the charges go off at once? And where on earth is it a "fact" that nothing can propel material as fast as a controlled demolition? That's like saying "No one can throw a baseball faster then a firecracker's explosion can". The compressed air from the pancaking floors above is forced down into the air-conditioned (and externally sealed) office floors, building up pressure, which causes SOME windows to blow out. It's kind of what happens when you press down on the handle of your bicicle pump. The handle may be way back, but air is still forced out of the air hose far away from the handle.
If you watch the documentary 911 Mysteries I linked to in the first post of this thread you'll see that these ejections preceded the descent all the way down to ground level. It's hard to believe that with a steel core, an off-center point of impact, cooling temperatures further away from the first explosion and the existence of tons upon tons of obliterated concrete support the hypothesis that this event was all caused by heat from the plane's fuel caused this level of destruction and the pancake theory. There are no pancakes at the bottom. Take then these ejections and they appear to some scientists and engineers as the kinds of squibs used in controlled demolitions.

Quote:
I hope you respond to this, because otherwise I feel you are not doing me the courtesy of having an actual conversation with me. Posting endless links and quotes from the Internet is not engaging in conversation, and it forces other people to do all the work and thinking for you. Please respond to these points here. Please to not cut and paste more photos and links.
The reason I post pictures and links is because I'm not a scientist but have been looking around to see what scientists, engineers, etc. think of all this, and it turns out there's no shortage of these kinds of people who question the official explanation.
post #206 of 470
Quote:
Originally Posted by Isildur's Bangs View Post
No, there was molten metal at ground zero, this is true. There are pictures out there. Don't feel like diggin it up, but suffice to say this doesn't in anyway support any sort of controlled demolition theory, the temperatures at ground zero were incredibly hot and the "pools of molten metal" were created in the days after the collapse.
Thanks. I had assumed it was true, and the logical explanation (for me) was that burning material trapped under the rubble trapped heat and allowed it to build up to steel melting levels, as was done in traditional steel melting kilns built of rock or brick. The Conspiracy people claim that only "thermite" could melt steel, ignoring the fact that blacksmiths have been melting iron for centuries, in their forges, without help from "thermite".
post #207 of 470
Quote:
Originally Posted by yt View Post
If you watch the first documentary I linked to, there were numerous eyewitnesses to this.
Yeah, but eyewitnesses who knew what they were talking about? We're back to the "it sounded like a bomb" argument.
post #208 of 470
Quote:
Originally Posted by yt View Post

If you watch the first documentary I linked to, there were numerous eyewitnesses to this.
Yes, okay, I'd heard of it too, but I always assumed that when you trap a huge multi-story fire under tons of rubble, you'll get the effect of a blacksmith's forge, which similarly traps heat in an oven until it gets hot enough to melt iron and steel. The collapse created a trapped, steel-melting situation. If the melted steel could ONLY be caused by thermite melting the steel, as the conspiracy theorists claim, then why was it STILL HOT ages later? The only way it could remain hot is because it the heat was trapped by the rubble. And once you admit that what is claimed to be "thermite melted" steel remained hot because of the rubble, you have to admit that the extremelty hot fires that were trapped (and continued to consume the pulverized contents of the buiding) would also have had IT'S heat trapped, heat that would have grown hot enough to melt steel AFTER the collapse, even if it could onlly get hot enough to soften it when burning in less trapped conditions.


Quote:
Originally Posted by yt View Post
Merely pointing out that some scientists disagree.
Why do you think these scientists are worthy of attention, from you, and from us?


Quote:
Originally Posted by yt View Post
If you watch the documentary 911 Mysteries I linked to in the first post of this thread you'll see that these ejections preceded the descent all the way down to ground level. It's hard to believe that with a steel core, an off-center point of impact, cooling temperatures further away from the first explosion and the existence of tons upon tons of obliterated concrete support the hypothesis that this event was all caused by heat from the plane's fuel caused this level of destruction and the pancake theory. There are no pancakes at the bottom. Take then these ejections and they appear to some scientists and engineers as the kinds of squibs used in controlled demolitions.
Of course windows blew out (from the pressure of air forced downward through the building) all the way down. If you read about the design of the building, the engineer took an unusual approach and made the supports around the shell of the building take most of the load (this unusual design was in response to the problem of making a building that massive stable). The "core" as you put it, was PART of the support, and once the outer skin's support collapsed the central core could not hold the buildin up by itself .. it would either be dragged down and or crushed by the floors above falling on it.
And the building was designed to survive (and did survive) damage to part of it, as both building managed to stay up for quite a while, even with huge holes punched into the support structure in the outer skin. In the picture you showed, you showed one relatively tiny explosion from a window below the collapsing parts. Since the building stayed up after being hit by a huge airplane, why would a "squib" that only blew out a few windows help bring the whole buiding down? A Controlled Demolitions would involve charges the went off evenly around the whole building, and a demolition charge at the central core wouldn't just blow out a few windows. Either they were real demolition charges (in which case you'd need many more of them, of much higher explosive power) or they were not.

As for the "pancake theory", once the building starts falling, the falling portion is going to gather more and more mass as it falls, become heavier and heavier as it collects more floors as it falls. It wouldn't just slow down as it descended, in fact it would fall with ever increasing destructive power, as it gained in mass.


Quote:
Originally Posted by yt View Post
The reason I post pictures and links is because I'm not a scientist but have been looking around to see what scientists, engineers, etc. think of all this, and it turns out there's no shortage of these kinds of people who question the official explanation.
You are looking HERE to see what scientists and engineers think of all this? Tell me, have you done us the courtesy of reading all the material at Popular Mechanics which is full of scientists and engineers? I need to know the answer. Have you been honest and open minded? Have you read ALL the articles on that site, not just the conspiracy sites who are refuting it? I need a yes or no .. have you read that site? Have you given it a chance? Here's the link again, the first page. http://www.popularmechanics.com/tech...42.html?page=1

And please answer, YES or NO, have you been open minded enough to read that site thoroughly?
post #209 of 470
shit, wrong thread.
post #210 of 470
Quote:
Originally Posted by yt View Post
First of all, how am berating anybody? I'm really just curious, maybe a little angry but not at anyone on CHUD. I'm angry because of the possible implications, having not really focused on 9/11 because the whole thing is/was too traumatic until now.

I personally can't come up with a hypothesis but I'm interested in what people who have a background in physics, engineering, chemistry, etc. have to say about this because instinctively, I see the towers falling with my own eyes and try to make that gibe with the official explanation and it doesn't. Ergo, I'd like to find out more about this, read as much as I can, and decide for myself what the most likely hypothesis is based on what limited knowledge I have and what exists out there (difficult since the evidence and the crime scene have been for the most part destroyed).

Sado, yeah, but for those explanations to make sense, you would have a much more irregular falling pattern, wouldn't you? If metal is weakening, wouldn't it lean, tilt, maybe break off? How does it disintegrate like that in rapid succession all the way down to the earth at near the speed of gravity?

Here's a comment from one of the engineers at the first site I linked to speaking to this:

"Structural steel is highly ductile, when subjected to compression and bending it buckles and bends long before reaching its tensile or shear capacity. Under the given assumptions, “if” the structure in the vicinity of either burning aircraft started to weaken, the superstructure above would begin to lean in the direction of the burning side. The opposite, intact, side of the building would resist toppling until the ultimate capacity of the structure was reached, at which point, a weak-link failure would undoubtedly occur. Nevertheless, the ultimate failure mode would have been a toppling of the upper floors to one side—much like the topping of a tall redwood tree—not a concentric, vertical collapse."

link
yt, PLEASE look at the picture of one of the towers falling and tell me whether or not YOU think that the building is falling in a "symmetrical" pattern, or is leaning. Stop quoting the "scientists". Tell us what YOU think. (link below).
Please answer, because you've repeated this stuff about the towers falling "evenly" as if it were a "planned demolition" several times, without responding once to that picture.

http://www.popularmechanics.com/tech...42.html?page=4
post #211 of 470
Quote:
Originally Posted by NoDiggity View Post
Please answer, because you've repeated this stuff about the towers falling "evenly" as if it were a "planned demolition" several times, without responding once to that picture.

http://www.popularmechanics.com/tech...42.html?page=4
It looks photoshopped to me!!

(I jest)

I pointed this out on the first page, in the video she linked it shows the same thing in video *incase a photoshopped claim is made*
post #212 of 470
Quote:
Originally Posted by NoDiggity View Post
Thanks. I had assumed it was true, and the logical explanation (for me) was that burning material trapped under the rubble trapped heat and allowed it to build up to steel melting levels, as was done in traditional steel melting kilns built of rock or brick. The Conspiracy people claim that only "thermite" could melt steel, ignoring the fact that blacksmiths have been melting iron for centuries, in their forges, without help from "thermite".
Aluminum
post #213 of 470
I want to add that as the buildings collapsed, the air that is forced into the burning fires as those floors descend would heat the fire like a blacksmith's bellows, pumping oxygen into it and causing it to heat up fantastically. Ask any fireman what happens to an ordinary building fire in high winds.
post #214 of 470
Quote:
Originally Posted by NoDiggity
That picture looks like a piece of steel that was twisted, bent, torn apart. It doesn't look like it was "melted". Could the force of twisting the metal heated it up a bit and softened it somewhat? ? I'm not an expert, but just take a paperclip and bend it back and forth many times, and see how amazingly hot it gets. Nevertheless That piece is all jagged like it was torn apart while NOT in a molten state.

Quote:
Originally Posted by yt View Post
I don't know. But is there enough of a question to warrant tests of some kind?
Why does it warrant "tests" if the obvious explanation already exists? Supposing you say "that steel looks like it was melted by the acid saliva of a space creature" does it warrant "tests" to prove or disprove it? If they decide that testing for Alien DNA on the steel beam is a waste of time and money, does that prove that they are covering up from the acid-dripping Alien?

If you have a perfectly obvious and normal explanation for why the steel is torn and bent (the collapse of a massive building that the steel was part of) you don't go looking for and testing any "theory" that anyone comes up with. The conspiracy theorists could have you spending money testing the thing forever. Once they test for Alien DNA, they could say it was melted by the weapons of Aliens, which send beams of neutrons at the steel, and when they test for neutron bombardment, and find no evidence of it, they can switch ad-infinitum to theory after theory. That people don't bother testing endless theories is not proof of a "cover-up". They simply already had a perfectly good explanation for it, and didn't want to waste time or energy on extremely unlikely alternate reasons.
post #215 of 470
There are simply some things we'll never know unless we can be in the buildings or on one of the planes at the moment of impact. Which isn't a possibility. But that gap of knowledge doesn't seem wide enough to wedge a conspiracy into.
post #216 of 470
Thread Starter 
The Popular Science takes the straw man approach - cherry-picking what it wants to debunk and ignoring the more provocative questions. I'll do a point by point examination if anyone's interested.
post #217 of 470
I'm still baffled as to why people are looking for excuses here. Plane hits building, building falls, people die. Repeat as necessary. There's no mystery here. Just because a conspiracy theorist says a question is provocative doesn't mean it actually is. I bet someone somewhere thinks that scheduled maintenance taking place the weekend before is provocative, but it isn't.
post #218 of 470
Quote:
Originally Posted by yt View Post
The Popular Science takes the straw man approach - cherry-picking what it wants to debunk and ignoring the more provocative questions. I'll do a point by point examination if anyone's interested.
You can but you should answer his question, that's why he linked that article. If you want, I'll just point you to the picture he's talking about to make it easier.

post #219 of 470
Quote:
Originally Posted by yt View Post
Tthe straw man approach - cherry-picking what it wants to debunk and ignoring the more provocative questions.
Funny, that.
post #220 of 470
Quote:
Originally Posted by yt View Post
Steven Jones wasn't even one of the official investigators and he found this:


Dr. Jones as no credibility (and I don't mean Indiana).

The "micro-spheres" were found to be a product of the high temperatures;
http://web.archive.org/web/200601141...logy.Final.pdf

Quote:
2.3.5 Heat affected particulate and combustion products

Particles that either were formed as a consequence of high temperature or were modified by exposure to high temperature are important WTC Dust
Markers for WTC Dust. Fires that were a part of the WTC Event produced
combustion-modified products that traveled with other components of WTC
Dust. Considering the high temperatures reached during the destruction of
the WTC, the following three types of combustion products would be
expected to be present in WTC Dust. These products are:

• Vesicular carbonaceous particles primarily from plastics
Iron-rich spheres from iron-bearing building components or contents
• High temperature aluminosilicate from building materials

There were considerable amounts of plastics in the WTC buildings, that upon heating and liberation of volatiles produced spherical (or nearly so) carbon rich particles with vesicles related to emission of volatiles. Figure 18 shows typical carbonaceous materials from a Background Building and Figure 19 shows porous heat affected particulate in the WTC Dust. Figure 20 shows a PLM image of porous heat affected particulate in the WTC Dust.
post #221 of 470
Quote:
Originally Posted by yt View Post
The Popular Science takes the straw man approach - cherry-picking what it wants to debunk and ignoring the more provocative questions. I'll do a point by point examination if anyone's interested.
Please look at this picture, and tell me YOUR opinion of whether or not the building was tilted as it fell. And watch the video that YOU linked us to at the beginning of the thread! It actually shows the building tilting from a different angle, and actually SAYS that it's tilting (above the flames). So I need you to look at the picture (and the portion of the video you linked us to) and tell us if the building is or is not tilting as it falls. (this explains also why the central core is being destroyed, because the outer building is pushing and pulling at the core off center). Just look at this ONE PHOTO and tell me what you think. Is it tilting or isn't it?

http://media.popularmechanics.com/im...r-collapse.jpg
post #222 of 470

YT .... the part about Demolition in YOUR video!

I watched it, and it LIES to you right in the video, while you are watching the proof that they are lying! For instance, they show you videos of buildings being demolished (small buildings compared to the WTC towers), and if you look at the videos you can see the smaller demolition charges going off, the buildings falling, and then a big cloud of dust from the building collapse spreading out from the building and expanding. The video LIES about that big cloud of dust, claiming that it is in fact the result of a DEMOLITION EXPLOSION even though the videos clearly show the demolition charges going off before the building(s) fall down! Then, after making that blatant lie about what's right in front of your eyes, they then claim that the big clouds of dust expanding from the WTC collapse were in fact caused by demolition charges going off ! Seriously, watch that video that you told us to look at and see for yourself! And please respond to this and tell me whether what I just told you is accurate or not.

P.S. I just realized what they are trying to suggest ... that the huge cloud of dust is caused by the demolition charges alone, and have nothing to do with the building crumbling! But you can see the demolition charges going off, and they make relatively small puffs of dust compared the the huge ones that appear after the building's collapse. The collapse causes the big cloud of dust, not the demolition charges.
post #223 of 470

YT ... Question your video asks, why did the second tower to be hit fall first?

Seriously, the stupid video actually asks this question, as if it were serious! The tower that got hit second fell first BECAUSE it was hit way lower down on the tower, while the second tower to be hit was hit nearer to the top. So this means that the tower that was hit lower down had a LOT more building weighing down on it from above. This has been explained over and over again, it was explained within hours of the building falling. Why does your video find it such a myster? t doesn't, it's just LYING to you in order to sell itself. I would like you to answer me as to whether you think the fact that being hit lower down is going to cause a buidling to collapse faster, because of the incresed weight pushing down on the damaged part from above.
post #224 of 470
Quote:
Originally Posted by yt View Post
The Popular Science takes the straw man approach - cherry-picking what it wants to debunk and ignoring the more provocative questions. I'll do a point by point examination if anyone's interested.
That doesn't answer the question of whether you've actually READ the articles at Popular Mechanics. have you read them or haven't you? We don't want you to cut and paste arguments from other sites about it, we want you to actually read them first.

Have you or have you not read the articles on that site? Read them yourself, not read people saying stuff about it that you don't know is true, because you haven't read it yourself? Have you read those articles?
post #225 of 470

YT, about the "pushing through a door" analogy on YOUR VIDEO.

In the video it mocks the idea that the building would not slow down as it fell. It uses the example of someone slowing down to push through a heavy door. Well, who has more trouble pushing through a door, a little kid, or a tall fat man? The answer is the little kid has a harder time, and the Tall Fat Man has an easier time, because his larger MASS in motion applies more energy to the door and pushes aside more easily. The more massive the person in motion, the less they are slowed down by a door in their way. Similarly with the Twin Towers, only Falling parts kept gathering mass as they fell, collecting floors as it went down, so it wouldn't have been slowed down.
post #226 of 470
I think YT broke NoDiggity with her rational..., where do we go to order replacements?
post #227 of 470
Thread Starter 
I realize the absurdity of me trying to argue points in this forum. For one thing, I'm not a scientist and the only way to unlock this mystery will be science. Believe it or not, scientists are debating issues of the freefall, sources of intense heat, zinc and iron sphericals because these questions were not resolved by NIST's hypothesis, which was contradicted by RJ Lee's and Dr. Jones' reports, and certainly not addressed in the PM whitewash (and yes, NoDiggity, I read the whole thing).

But even though I see it as a heinous crime, there's still the objective of preventative science that drove NIST's study. If this is a natural occurrence, where is the hypothesis governing the event that can be used in future high rise design? There isn't one. Why?

I admit, it's all completely over my head, so you can go your way and I'll go mine. But I'm going to continue to read as much as I can about this to attempt to understand it.
post #228 of 470
I've asked a few times.......why wont anyone here talk about how BUILDING 7 collapsed???????
post #229 of 470
Quote:
Originally Posted by DarthSidious View Post
I've asked a few times.......why wont anyone here talk about how BUILDING 7 collapsed???????
http://www.popularmechanics.com/tech...ml?page=5#wtc7
post #230 of 470
We all know building 7 collapsed because after the conspiracy was complete, someone realized that in their perfect planning and execution they forgot to detonate it with the towers (which would have been more believable, obviously). So they waited a few hours, and then detonated it. Much high-fiving was done. Obviously.
post #231 of 470
The study ElCapitan posted on the very first page concisely explains how numerous factors contributed to the collapse of the tower. The real important findings don't even require advanced knowledge of physics and engineering to grasp.
  • Heated metal loses it structural integrity. [Home test: straighten out a paper clip, hold it a couple inches above a lighter, watch the unsupported end begin to bend downwards. Note that you did not have to melt clean through the paper clip for this to happen, only heat it.]
  • Due to the loss and weakening of support columns at and around the plane's impact, those remaining were over-burdened to the point of failure which causes the initial plummet of the upper half of the building.
  • There is now an awful lot of weight falling towards the remaining half of the tower which is not able to absorb the impact and collapses under it.
  • Every floor that collapses further contributes to the falling mass, rapidly increasing its kinetic energy such that the remaining floors and supports dont even have an effect on its falling momentum.
From this mechanical engineer's point of view, nothing more is honestly required to explain the collapse of the tower.

Quote:
Originally Posted by yt View Post
But even though I see it as a heinous crime, there's still the objective of preventative science that drove NIST's study. If this is a natural occurrence, where is the hypothesis governing the event that can be used in future high rise design? There isn't one. Why?
Sadly, there isn't a way to prevent a building from collapsing if it has a significant number of its supports weakened/destroyed. And while no one wants to hear it, the hijackers got lucky with the second plane, hit the tower low enough and compromised enough of the support structure to cause the collapse. The other buildings went down because of the ground level destruction the first tower caused.

It's certainly a tragedy, but the crime isn't that the WTC collapsed, the crime is that 4 airplanes were successfully hijacked by guys with boxcutters and flown into buildings. Everything else is technically collateral damage.

re. Building 7, see http://chud.com/forum/showpost.php?p...&postcount=162 It was a page back, so I can see how you might have missed it.
post #232 of 470
Quote:
Originally Posted by DarthSidious View Post
I've asked a few times.......why wont anyone here talk about how BUILDING 7 collapsed???????
I'm throwing out one plausable possibility.

Gravity.

Any takers?
post #233 of 470
Quote:
Originally Posted by Snaieke View Post
I'm throwing out one plausable possibility.

Gravity.

Any takers?
You. Fucking. Moron. We can't even EXPLAIN gravity. Why do all of you sheep just line up and buy the "gravity" idea bandied about by scientists and the media? I'm just asking the questions the rest of you are afraid to ask!

(Man, Snaieke, I'm grateful for you leading me to such a fun and appropriate metaphor)
post #234 of 470
Newton's theory of gravity is just that, a theory. Pay attention people.
post #235 of 470
Quote:
Originally Posted by ElCapitanAmerica View Post
Newton's theory of gravity is just that, a theory. Pay attention people.
Why isn't anyone even talking about the fact that gravitation under general relativity falls apart below the Planck Length??? Do I need to connect the dots for you people?
post #236 of 470
Thread Starter 
Quote:
5.3.3 Immediate Reaction to the FEMA BPA Report

5.3.3.1 Structural Engineers

On Christmas Day, 2001 The New York Times reported that some of the nation's leading structural engineers and fire-safety experts believe the investigation into the collapse of the WTC was inadequate, and were calling for a new, independent and better-financed inquiry. Experts critical of the investigation included some who actually took part in it. The team of 20 or so investigators, who conducted their review between October 7-12, had no subpoena power, inadequate financial and staff support, and had
been prevented from interviewing witnesses and frequently prevented from examining the disaster site, and had even been unable to obtain basic information such as detailed blueprints of the buildings.[156]
The Times account of the BPA team activities contrasts sharply with the account provided in the FEMA BPA Executive Summary.

5.3.3.2 Firefighters

On January 4, 2002, an editorial in Fire Engineering, a trade magazine with ties to the New York Fire Department, called the investigation into the collapse of the WTC a "half-baked farce." The article pointed out that the probe had not looked at all aspects of the disaster and had limited access to documents and other evidence. Bill Manning, editor of the magazine, noting that destruction of evidence is illegal, demanded that the destruction and removal of the steel columns must stop immediately. [157] The decision of the City of New York to rapidly recycle the 300,000 tons of steel columns, beams and trusses from the WTC in the days immediately after 9/11 adversely affected the FEMA BPA inquiry. [158]

5.3.3.3 Congress

Congressman Boehlert, Chairman of the Science Committee of the House of representatives, testified "I must say that the current investigation- some would argue that 'review' is the more appropriate word- seems to be shrouded in excessive secrecy" and "…valuable evidence has been lost irretrievably, and
blueprints were unavailable for months." [159]

Professor Glenn P. Corbett, John Jay College of Criminal Justice testified before the Science Committee of the House of Representatives on March 6: "The collapse of the World Trade Center towers were the largest structural collapses in world history. A disaster of such epic proportions demands that we fully resource a comprehensive, detailed investigation. Instead, we are staffing the BPAT with part-time engineers and scientists on a shoestring budget." Corbett further noted "The steel holds the primary key to understanding the chronology of events and causal factors resulting in the collapse," and recommended an investigative commission on the World Trade Center Disaster. [160]

ASME representative Gene Corley testified before the Science Committee of the House of Representatives on March 6: "Resources allocated to support our BPA team's activities is about 1 million. In our opinion, 40 million would be sufficient." [161] The Science committee itself, in its March 6, 2002 report, called for a broader WTC investigation. Rep. Felix Grucci (R-NY): "We need to
continue to work together, to find what answers we can, and attempt to piece together as much information as possible on the cause of the collapse." [162]

In a letter to Mr. Mitchell E. Daniels, Jr. Director, Office of Management and Budget, the committee wrote: "There was unanimity among the witnesses on the need for a comprehensive assessment and research agenda to address evacuation procedures, emergency response, and structural analysis of the
site's buildings." [163]

5.3.3.4 Media

Even the New York Times has expressed dismay. On the first anniversary of the attacks (subsequent tothe FEMA BPA study and final report), the Times wrote: "The public knows less about the circumstances of 2,801 deaths at the foot of Manhattan in broad daylight than people in 1912 knew
within weeks about the Titanic, which sank in the middle of an ocean in the dead of night." [164]
From another interesting examination of the 9/11 event and investigation: Mysteries of the Twin Towers
A Survey of the Available Evidence
On the Collapse of the World Trade Center Towers
Rodger Herbst; BAAE, ME
Rev. 10.1, March 26 2008
post #237 of 470
Who is Rodger Herbst?

Also, who are these "leading structural engineers" claiming to support this conspiracy, let's see some names and credentials.

Also the link you just posted is basically a regurgitation of every other crackpot theory on this, is there anything new there, please summarize so we don't have to waste too much time.
post #238 of 470
Thread Starter 
One thing this report does is compare key sections of the FEMA, NIST, etc. reports and overlap in staff. I don't know if it would be worth your time, but this report seems fairly comprehensive and is fascinating to me, even criticizing in parts what I find out now are called "911 truthers."
post #239 of 470
There is so much wrong with that "report", where do you start?

Well, let's start at the very beginning "Van Romero" quickly retracted that statement and clarified that he believed the towers were obviously knocked down due to the flames and impact. Now, this thing has a very recent date, why would they omit to inform you and all of us of that important little tidbit?

Poorly researched, or just plain written by somebody who doesn't understand the obvious facts of the attack?

Also the paper I posted in the 1st page makes all these opinions null, since it explains the similarities of what happened with a controlled demolition ... equations and all.

Where are the references? This poorly written article doesn't provide any, are they in another document?
post #240 of 470
Thread Starter 
The footnotes are here.

This is a survey of available information on 9/11 and is more focused on providing questions than answers. It questions the various reports, including Dr. Jones's, the contradictions between the various reports (that were authored in many instances by the same people) and emphasizes the need for further tests and study. I just finished reading it and while most (read: all) of you think my judgment is lopsided, I found it refreshingly logical and direct.

In terms of Van Romero, he changed his story. Why? Who knows. A site I read last night that I can't find now followed up on him. I will try to find it.
post #241 of 470
Quote:
Originally Posted by yt View Post
I
I admit, it's all completely over my head, so you can go your way and I'll go mine. But I'm going to continue to read as much as I can about this to attempt to understand it.
http://media.popularmechanics.com/im...r-collapse.jpg

All you have to do to prove to us that you have an open mind is look at this photograph of the south tower collapsing, and tell us whether or not it looks, to you, like the tower was tilting as it fell. Why do you refuse to do this?
post #242 of 470
This thread has just depressed me terribly. I can't stand seeing a seemingly rational mind fall into something like this. It's painful. I'm not even kidding.
post #243 of 470
Thread Starter 
Quote:
Originally Posted by ElCapitanAmerica View Post
Also the paper I posted in the 1st page makes all these opinions null, since it explains the similarities of what happened with a controlled demolition ... equations and all.
Maybe not this specific study, but this piece does address progressive collapse and ask for further analysis:

Quote:
5.6.4 Analysis and Simulation

5.6.4.1 WTC tower structure
Let us roughly characterize the actual WTC tower structure. The 1375 ft. tall towers of 110 12.5 ft. floors consisted of a perimeter of 244 structural steel columns forming a square plan, with horizontal bracing (spandrels) and extremely rigid chamfered corners. The peripheral steel columns from the 9th through the 106th floors spanned three floors vertically, and were built into massive steel wall sections measuring about 10 ft wide by 27.5 ft. (three floors) tall, consisting of three 14 inch square hollow box columns spaced three ft. four inches apart, and welded to thick steel plate spandrels. The building core, of dimensions 79X139 ft., was a veritable forest of 47 columns, horizontal and diagonal cross braced, which housed primarily elevator shafts.
The 47 core columns varied in thickness with floor height. Individual core columns in the lower core measured 52 x 22 in. (in plan), and were formed of 5 and 3 inch plate into almost solid steel shafts that weighed up to 56 tons. [212] Other sources, including FEMA, note the average core box column cross section to be 12" wide x 36" deep x 2" thick, having a cross sectional area of 176 square inches. The box cross section construction changed to relatively light I-beam cross section above the 85th floor.[213] Hufschmid indicates the perimeter columns also decreased in thickness with increasing floor height. [214] Each tower weighed 500,000 short tons or 454545 metric tons ( 1 metric ton=1.1 short ton). The intact 16 story section above aircraft impact weighed 58,000 metric tons. Thus, the upper 16 of the 110 floor system, or 14.5 % of the floors, weighed only about 12.7% of the total building weight, so the majority of the mass per floor was in the lower floors. [215]

NIST analysis of building natural periods before and after impact shows overall stiffness of the towers was not appreciably affected by aircraft impact. [216]

5.6.4.2 Descending Block Scenario during “collapse initiation.”

According to Brent Blanchard, senior writer for Implosion-World.com, a review of all photographic images clearly shows about 95% of falling debris being forced away from the footprint of the structure. [217] Yet the official story has it that the floors of this upper descending “block”, consisting of 15 floors
with lighter supports, was able to “pile up” and out-crush the more massive supports of the floors of the lower block, consisting of 85 floors. If columns and trusses in the impact area failed in a collapse fed only by gravity, what happened to the massive lower core columns?

NIST only considers events from the moment of aircraft impact until “collapse initiation.” [218] Incredibly, “progressive collapse” of the lower floors has been left out of the NIST collapse sequence computer models! [219]

In dealing with the collapse sequence, NIST states repeatedly that energy of the downward movement of the building mass above the damaged columns exceeded the strain energy that could have been absorbed by the lower floors, so global collapse ensued [220] This is the essence of “progressive collapse” theory, and it has been assumed, not demonstrated, not proven.
Finnish 9/11 activist Sami Yli-Karjanmaa was among the first critics of the NIST report. [221] He noted the truncation of models to reduce model size and improve computation time, failure to simulate the collapse, and the NIST collapse mantra, "repeated 12 times in the project 6 report dealing with the collapse sequence: 'The change in potential energy due to downward movement of building mass above the buckled columns exceeded the strain energy that could have been absorbed by the structure. Global collapse then ensued.'"

5.6.4.3 Where is the momentum transfer analysis?

Stress and strain energy are in the domain of the theory of elasticity, yet NIST provides no elasticity analysis to substantiate its position. Fundamental to application of the theory of elasticity to the WTC North Tower collapse is the fact that impact of the “upper block” with the “lower block” will not just
stress the topmost floor of the lower block; rather, the stress will be propagated rapidly downward and upward to the rest of the floors. This propagation will absorb energy, and the question is, as in the case of an elastic spring, how much energy can the structure absorb without breaking. Manuel Garcia, in an article for Counterpunch, says that he takes up the analysis of the collapse of the towers “where NIST left off” in describing the floor-by -floor collapse, but makes the same assumption as NIST, that the
energy of descending floors is more than the structure can absorb. He does not consider the benefit of elasticity is absorbing energy, but only looks at the destructive aspects of the descending “wave train.”

[222] Gordon Ross has applied the theory of elasticity in a comprehensive way to show that the momentum of the upper impacting floors would be absorbed during the three percent elongation phase of the steel columns of the very top floor, and therefore collapse would not proceed. [223] Because NIST has not provided such an analysis, the NIST mantra remains unproven.

The NIST investigation also omitted or distorted many other important aspects of the collapses, including movement of the WTC1 antenna before the adjacent façade, the pyroclastic dust clouds, and pools of molten metal in the WTC basements weeks after the attacks. [224]

NIST failed to provide follow up study on an unusual sulfur residue which was found during the FEMA BPA study, and which FEMA recommended be investigated in future studies. [225]

5.6.5 Steven Jones on Kevin Ryan and NIST:

Jones agrees with Kevin Ryan's objections regarding the NIST study. [226] Jones also challenges NIST's collapse theory: “NIST maintains that all three building collapses were fire-initiated despite contrary observations, particularly the fact that fire endurance tests with actual models did not result in collapse….The computerized models of the Towers in the NIST study, which incorporate many features of the buildings and the fires on 9-11-01, are less than convincing. [227]

NIST constructs a computer model--but realistic cases do not actually lead to building collapse. So they "adjust" inputs until the model finally shows collapse initiation for the most severe cases. [228] NIST notes explicitly several times in its final report that the computer simulation only proceeds until the building is “poised for collapse.” Jones asks: What about the subsequent complete, rapid and symmetrical collapse of the buildings? What about the observed squibs? What about the antenna dropping first in the North Tower? What
about the molten metal observed in the basement areas in large pools in both Towers and WTC 7 as well …Well, some of us want to look at ALL the data, without computer simulations that are "adjusted," perhaps to make them fit the desired outcome. [229]

Ryan did his own statistical analysis in a recent letter regarding the NIST report, arguing that probabilities of collapse-initiation needed to be calculated (Ryan, 2005). NIST nowhere provides such a likelihood analysis for their non-explosive collapse model. Ryan's analysis is that the probability that aircraft damage and fires (the "official theory") could cause the Towers complete collapse is less than one in a trillion (Ryan, 2005). “So where does that leave us? I strongly agree with Kevin Ryan, ‘This ["official"] story just does not add up...” [230]
post #244 of 470
Thread Starter 
Continued:

Quote:
5.6.6 The Engineering Community

A lone scientist, Abdolhasan Astaneh Asl, funded by the National Science foundation, got access to the steel before the ASCE/FEMA team. Despite the fact that 40 percent of a steel beam was torn away, the column did not collapse, an example of redundancy built into the 1970s-vintage structure. With admiration, Asl said "The impact did nothing to this building." [231]

The engineering community has raised questions about the results of the NIST WTC investigation. The popular British construction industry magazine New Civil Engineer International (NCEI) notes:

Controversy still surrounds the exact collapse mechanism of the Twin Towers, despite three years of detailed investigation by the National Institute of Standards & Technology (NIST) team. Some engineers believe the collapse was influenced by factors other than the fires caused by burning aviation
fuel which weakened vital structural steel elements. And they have accused NIST of repeatedly changing its explanation of the collapse mechanism….”In this latest version, the hat trusses on top of the towers play a crucial role in the redistribution of stresses after the impact,” one leading US structural
engineer told NCE in New York “In earlier versions they are hardly mentioned.” [232]

Regarding the analysis used to bring the towers to the point of being “poised for collapse,” NCEI notes: “NIST had obviously devoted enormous resources to the development of the impact and fire models…The software used has been pushed to new limits, and there have been a lot of simplifications, extrapolations and judgment calls.” The same article notes NIST is “refusing to show computer visualizations of the collapse of the Twin Towers despite calls from leading structural and fire engineers…Visualizations of collapse mechanisms are routinely used to validate the type of finite element analysis model used by the investigators.” University of Manchester [U.K.] professor of structural engineering Colin Bailey said there was a lot to be gained from visualizing the structural response. "NIST should really show the visualizations; otherwise the opportunity to correlate them back to the video evidence and identify any errors in the modeling will be lost." [233]

James Quintiere, Ph.D., one of the world’s leading fire science researchers and safety engineers, and former Chief of the Fire Science Division of the National Institute of Standards and Technology (NIST), has called for an independent review of NIST’s investigation into the collapses of the World Trade Center Towers on 9/11.

Alan Miller has written an excellent article on Quintiere’s plea. Miller notes that Dr. Quintiere gave his presentation “Questions on the WTC Investigations” twice at the 2007 World Fire Safety Conference, June 4- 5, 2007. Although Quintiere apparently does not consider controlled demolition a possible
collapse mechanism, his frustration and objections regarding the NIST WTC study include those of 9/11 Truth researchers, as well as the engineering community. Responding to a comment from a NIST representative in the audience, Dr. Quintiere said, “I found that throughout your whole investigation it was very difficult to get a clear answer. And 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...” [234]

Dr. Quintiere’s presentation at the World Fire Safety Conference echoed his earlier statement to the U.S. House of Representatives, Committee on Science, on October 26, 2005, during a hearing on “The Investigation of the World Trade Center Collapse: Findings, Recommendations, and Next Steps”, at
which he stated: “In my opinion, the WTC investigation by NIST falls short of expectations by not definitively finding cause, by not sufficiently linking recommendations of specificity to cause, by not fully invoking all of their authority to seek facts in the investigation, and by the guidance of government lawyers to deter rather than develop fact finding."

Dr. Quintiere noted that a number of questions had been submitted to NIST which were never acknowledged or answered. Those questions include the following: "Why were not alternative collapse hypotheses investigated and discussed as NIST had stated repeatedly that they would do?" Noting destruction of the WTC steel, Quintiere remarked that a careful reading of the NIST report shows that they have no evidence that the temperatures they predict as necessary for failure are corroborated by findings of the little steel debris they have. "Why hasn't NIST declared that this spoliation of the steel
was a gross error? " NIST used computer models that they said have never been used in such an application before and are the state of the art. ...." But the validation of these modeling results [235] is in question. Others have computed aspects with different conclusions on the cause mechanism of the
collapse. Moreover, it is common in fire investigation to compute a time-line and compare it to known events. NIST has not done that. " "Testing by NIST has been inconclusive. Although they have done fire tests of the scale of several work stations, a replicate test of at least [one] WTC floor would have been of considerable value. Why was this not done? ... " [236]
post #245 of 470
Does it sound too cynical if you find some web page claiming "the government" got to Mr. Romero?
post #246 of 470
Thread Starter 
Quote:
Originally Posted by NoDiggity View Post
http://media.popularmechanics.com/im...r-collapse.jpg

All you have to do to prove to us that you have an open mind is look at this photograph of the south tower collapsing, and tell us whether or not it looks, to you, like the tower was tilting as it fell. Why do you refuse to do this?
Yes, I looked at it. It looks like it was tilting. But that begs the question - why did this big chunk of building not buckle and fall? Why does it instead either appear to be vaporized into a cloud of dust or sucked into an implosion? Not saying I know the answer, just that it provokes the question.
post #247 of 470
Thread Starter 
Quote:
Originally Posted by ElCapitanAmerica View Post
Does it sound too cynical if you find some web page claiming "the government" got to Mr. Romero?
Listen, I didn't assert that for the very reason and since I have no first-hand knowledge I wasn't going to imply that "the government" got to him, but I was going to try to find the site that linked to news stories about him in case you were interested.
post #248 of 470
Thread Starter 
Quote:
Originally Posted by Greg David View Post
This thread has just depressed me terribly. I can't stand seeing a seemingly rational mind fall into something like this. It's painful. I'm not even kidding.
wtf? Assuming you're not talking about NoDiggity, would it help if you knew that the person whose descent into irrationality is causing your depression once went to a day-long conference about JFK conducted by the photo archivist for the House Select Committee on Assassinations?
post #249 of 470
Quote:
Originally Posted by yt View Post
Yes, I looked at it. It looks like it was tilting. But that begs the question - why did this big chunk of building not buckle and fall? Why does it instead either appear to be vaporized into a cloud of dust or sucked into an implosion? Not saying I know the answer, just that it provokes the question.
It IS falling in that picture! In the video that you posted at the top of the thread, you can see the building from a different angle, tilting as it falls. You quoted a guy who was mocking the "plane weakened he building" theory, and saying that if the plane weakened the building then it would have tilted towards the weak spot. Well, there it is, tilting. So the question to you is, was that "expert" full of crap or wasn't he? He said the building wasn't tilting, the photo shows it definitely was. So answer the question, is this person you quoted worth paying attention to , or isn't he?
post #250 of 470
Quote:
Originally Posted by yt View Post
Yes, I looked at it. It looks like it was tilting. But that begs the question - why did this big chunk of building not buckle and fall? Why does it instead either appear to be vaporized into a cloud of dust or sucked into an implosion? Not saying I know the answer, just that it provokes the question.
And it's NOT "vaporizing, you can see steel beams being sprayed outwards. It's not being "sucked into an implosion" the floors are collapsing onto eachother, which means they are "disappearing" into the empty space between the floors. The cloud of dust obscures what's happening behind them, but that doesn't mean it's just "vaporizing."
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