![]() |
| If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|||||||
|
|
Thread Tools | Display Modes |
|
#111
|
|||
|
|||
|
On Wed, 15 Mar 2006 19:11:31 -0600, Dan wrote:
You never did answer my question: how did they hide the preparations required for a controlled demolition? Where did they put all the debris they would have had to remove in preparation? How come no one noticed a daily line of dump trucks hauling away the debris? Remember walls, windows, and structural members are always removed in preparation for controlled demolitions. What about all the structural members that had to be weakened with torch cuts? How about the several thousands of feet of det cord and charges placed in plain view? It would have taken weeks and much manpower just to prepare the buildings. How come no one noticed? Why do you keep refusing to answer? Any why didn't any of this stuff go off when the plane hit it. Top down demoliton requires explosives on every floor (since "truth" refuses to believe the pancake theory is even possible). |
|
#112
|
|||
|
|||
|
Laurence Doering wrote in
: On Wed, 15 Mar 2006 04:08:30 GMT, Wake Up! wrote: Laurence Doering wrote in news:47oh1kFgko4kU1 @individual.net: On Tue, 14 Mar 2006 08:50:53 GMT, Wake Up! wrote: "Wake Up!" wrote in news:Xns978626A6D8B0Atruth@ Whatever, though, for you to simply assume that WTC 7, a steel framed building, totally collapsed near free fall speed from fire, you are definitely not qualified. A qualified engineer would know that steel framed buildings do not completely collapse from fire. Never. Sorry. Which, I guess, means all those engineers who spend so much time devising fireproofing materials for steel structural members in buildings have been wasting their time all these years. There's a lot more evidence than what I put above. I think the fact that qualified engineers spend a lot of time and effort figuring out how to protect steel frame members from fire is extremely strong evidence that they think fires could cause a steel framed building to collapse, and that they want to keep that from happening for some reason. If you have "a lot more evidence" that qualified engineers are blithely unconcerned about the deleterious effects of fires on building structures, by all means feel free to post it. Imagine the money that could have been saved in the WTC towers alone -- all that fireproofing material sprayed on the buildings' steel structure could have been eliminated, and the costly and inconvenient effort to update the fire protection that was still not completed when the WTC towers collapsed was a colossal waste of time. If only they'd known what you apparently know -- that fire can't possibly reduce the yield strength of steel and cause structural failure. I never said that. The chance of all the abnormalities being pure coincidence is totally absurd. You said: "A qualified engineer would know that steel framed buildings do not completely collapse from fire. Never." Unless you're willing to postulate some mysterious magic force that holds steel-framed buildings up after a fire has weakened them, you are claiming that fire can't damage steel structures. Anyone who's ever done any welding knows that's ludicrously absurd. I guess all those web sites with pictures of what happened to the steel structure of Madrid's Windsor Building during a fire on February 2005 are fakes too, right? The Madrid Tower was not steel framed. The Twin Towers and WTC 7 were. The Windsor Tower in Madrid had a reinforced concrete core surrounded by a steel-framed structure. The Madrid Tower did not completely colllapse. The Twin Towers and WTC 7 did. The steel-framed portions of the Windsor Tower on and above the levels affected by the fire did completely collapse. Google for pictures of the building after the fire, and notice how the concrete core was all that remained standing of the entire upper half of the building. Google will also tell you that the Windsor Tower was described as having been "destroyed" by the fire, that Madrid officials believed there was a very good chance the entire building would collapse after the fire was out, and that the remains of the tower have since been demolished. The Madrid Tower was a raging inferno for over 12 hours. The Twin Towers and WTC 7 were had a few fires for a very short period of time. WTC 1 and 2 burned about as intensely as you might want from the time the fires began until the towers collapsed, and fires continued burning in the rubble pile for weeks. WTC 7 burned out of control for at least 7 hours before collapsing. The Windsor Tower fire began about midnight, and photos of the fire show the steel frame failed completely while it was still dark. This means that, even though it took almost 24 hours for Madrid firefighters to extinguish the fire, the steel frame collapsed much sooner, before daybreak on the night the fire began. The fire in the North Tower was **very small**. Says you. If it was "very small", why does all the available video of the north tower during the time between impact and collapse show a massive smoke plume that could only come from a large fire? What about all the video that shows visible fire on multiple floors? More to the point, why did hundreds of people jump to certain death from the north tower if there was only a "very small" fire? Why didn't they stay put and wait to be rescued? They did not jump. Many were shaken out of the Towers from the explosions, and can be horribly viewed in the video 9/11 Eyewitness. If not, why did firefighters say it wasn't much and that all they needed was a couple of lines? Because you're quoting them out of context. Feel free to provide proof that the FDNY believed there was only a "very small" fire burning in WTC 1. ljd This is regarding WTC 2, not 1: excerpt from http://911research.wtc7.net/wtc/evidence/audiotape.html Seven minutes before the collapse, battalion chief Palmer is heard to say "Ladder 15, we've got two isolated pockets of fire. We should be able to knock it down with two lines." The widow of Chief Palmer was allowed to hear the tape before excerpts were released by the Times. She said: I didn't hear fear, I didn't hear panic. When the tape is made public to the world, people will hear that they all went about their jobs without fear, and selflessly. Palmer called for a pair of engine companies to fight the fires. The fact that veteran firefighters showed no sign of fear or panic, and had a coherent plan for fighting the fire, contradicts the official explanation of the collapses that the fires were so hot and extensive that they weakened the steel structure |
|
#113
|
|||
|
|||
|
Dan wrote in news:HX2Sf.61662$Ug4.7991@dukeread12:
TRUTH wrote: "Keith W" wrote in : "Wake Up!" wrote in message ... "Keith W" wrote in : The behaviour of steel in fire hasnt changed in 60 years and yes they were complete collapses I can cite other cases, the Hotel York in Redcar England was a 15 storey steel framed hotel that collapsed after a fire for example Based on the following quote from Jones' paper, it can be assumed that the collapses you mention above are not relevant to the current situation: No they are vidence of how full of **** Jones is. A New York Times article entitled “Engineers are baffled over the collapse of 7 WTC; Steel members have been partly evaporated,” provides relevant data. Experts said no building like it [WTC7], a modern, steel-reinforced high-rise, had ever collapsed because of an uncontrolled fire. (Glanz, 2001; emphasis added.) And they were wrong Fire engineering expert Norman Glover agrees: Almost all large buildings will be the location for a major fire in their useful life. No major high-rise building has ever collapsed from fire… The WTC [itself] was the location for such a fire in 1975; however, the building survived with minor damage and was repaired and returned to service.” (Glover, 2002) That fire was confined to approx half of a single floor rather than several floors and the building had not been damaged by a major impact. That makes a difference That’s correct – no steel-beam high-rise had ever before (or since) completely collapsed due to fires! Incorrect, I have given examples that you choose to ignore However, such complete and nearly symmetrical collapses in tall steel-frame buildings have occurred many times before -- all of them due to pre-positioned explosives in a procedure called “implosion” or controlled demolition. Which requires weeks of careful preparation by large work teams, none of whom were in evidence at the WTC snip The Towers' implosions were not typical. They were detonated top down. Therefore, any engineer truncating the investigation at collapse initiation will not see the evidence. You dont use explsoives to demolish buildings from the top down, you blow out the lower floors and some intermediate floors in a timed sequence Except when demolishing unique structures like the Twin Towers. Besides, the government couldn't make controlled demolitions *too* obvious You never did answer my question: how did they hide the preparations required for a controlled demolition? Where did they put all the debris they would have had to remove in preparation? How come no one noticed a daily line of dump trucks hauling away the debris? Remember walls, windows, and structural members are always removed in preparation for controlled demolitions. What about all the structural members that had to be weakened with torch cuts? How about the several thousands of feet of det cord and charges placed in plain view? It would have taken weeks and much manpower just to prepare the buildings. How come no one noticed? Why do you keep refusing to answer? The only info I have is the power down in the South Tower: http://69.28.73.17/thornarticles/powerdown.html http://killtown.blogspot.com/2005/12...interview.html Also, GWB's brother Marvin, and a cousin were executives in the WTC's security company By your tone / name calling, you sound a bit upset. Perhaps because you think there's something to Jones' claims afterall? I noticed you snipped out one of Jones' main points from my response, regarding NIST not performing analysis after collapse inituation. You have a history of name calling yourself. Only in direct retaliation. Why would NIST need to do an analysis after initiation of collapse when they already proved what how it started? It was simply a chain reaction. Dan, U.S. Air Force, retired Perhaps to learn clues to prevent a complete, freefall "fire induced" collapse from happening again, especially since: It never happened before, but on 9/11 it happened three times. An executive in the WTC Management said in his opinion the Towers could withstand multiple 707 impacts, and compared it to a pencil puncturing a screen netting. Firefighters made it up to the impact area of the South Tower and suggested nothing major. Also, are you aware that NIST literally "changed" the data in their computer simulation to get the Towers to collapse? And now they refuse to show the simulations to leading fire engineers who call for them. From Jones' paper: http://www.physics.byu.edu/research/energy/htm7.html The NIST report makes for interesting reading. The less severe cases based on empirical data were discarded because they did not result in building collapse. But ‘one must save the hypothesis,’ so more severe cases were tried and the simulations tweaked, as we read in the NIST report: The more severe case (which became Case B for WTC 1 and Case D for WTC 2) was used for the global analysis of each tower. Complete sets of simulations were then performed for Cases B and D. To the extent that the simulations deviated from the photographic evidence or eyewitness reports [e.g., complete collapse occurred], the investigators adjusted the input, but only within the range of physical reality. Thus, for instance,…the pulling forces on the perimeter columns by the sagging floors were adjusted... (NIST, 2005, p. 142; emphasis added.) The primary role of the floors in the collapse of the towers was to provide inward pull forces that induced inward bowing of perimeter columns. (NIST, 2005, p. 180; emphasis added.) How fun (perhaps) to tweak the model like that, until the building collapses -- until one gets the desired result. But the end result of such tweaked computer hypotheticals is not compelling, sorry gentlemen. Notice that the “the pulling forces on the perimeter columns by the sagging floors were adjusted” (NIST, 2005, p. 142; emphasis added) to get the perimeter columns to yield sufficiently – one suspects these were “adjusted” by hand quite a bit -- even though the UK experts complained that “the core columns cannot pull the exterior [i.e., perimeter] columns in via the floor.” (Lane and Lamont, 2005; emphasis added.) I also agree with Kevin Ryan’s objections regarding the NIST study. Kevin Ryan, at the time a manager at Underwriters Laboratories (UL), makes a point of the non-collapse of actual WTC-based models in his letter to Frank Gayle of NIST: As I'm sure you know, the company I work for certified the steel components used in the construction of the WTC buildings. In requesting information from both our CEO and Fire Protection business manager last year… they suggested we all be patient and understand that UL was working with your team… I'm aware of UL's attempts to help, including performing tests on models of the floor assemblies. But the results of these tests… indicate that the buildings should have easily withstood the thermal stress caused by… burning [jet fuel, paper, etc.]. (Ryan, 2004) That models of WTC trusses at Underwriter Laboratories (UL) subjected to fires did NOT fail is also admitted in the final NIST report: NIST contracted with Underwriters Laboratories, Inc. to conduct tests to obtain information on the fire endurance of trusses like those in the WTC towers…. All four test specimens sustained the maximum design load for approximately 2 hours without collapsing… The Investigation Team was cautious about using these results directly in the formulation of collapse hypotheses. In addition to the scaling issues raised by the test results, the fires in the towers on September 11, and the resulting exposure of the floor systems, were substantially different from the conditions in the test furnaces. Nonetheless, the [empirical test] results established that this type of assembly was capable of sustaining a large gravity load, without collapsing, for a substantial period of time relative to the duration of the fires in any given location on September 11. (NIST, 2005, p. 141; emphasis added.) So how does the NIST team justify the WTC collapses, when actual models fail to collapse and there are zero examples of fire-caused high-rise collapses? Easy, NIST concocted computer-generated hypotheticals for very “severe” cases, called cases B and D (NIST, 2005, pp. 124-138). Of course, the details are rather hidden to us. And they omit consideration of the complete, rapid and symmetrical nature of the collapses. Indeed, NIST makes the startling admission in a footnote on page 80 of their Final Report: The focus of the Investigation was on the sequence of events from the instant of aircraft impact to the initiation of collapse for each tower. For brevity in this report, this sequence is referred to as the "probable collapse sequence," although it does not actually include the structural behavior of the tower after the conditions for collapse initiation were reached...(NIST, 2005, p. 80, fn. 12; emphasis added.) Again, on page 142, NIST admits that their computer simulation only proceeds until the building is “poised for collapse”, thus ignoring any data from that time on. The results were a simulation of the structural deterioration of each tower from the time of aircraft impact to the time at which the building became unstable, i.e., was poised for collapse. ...(NIST, 2005, p. 142; emphasis added.) 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? Never mind all that: NIST did not discuss at all any data after the buildings were “poised for collapse.” 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. An hypothesis which is non- refutable is non-scientific. On the other hand, Occam's razor suggests that the simplest explanation which addresses and satisfies ALL the evidence is most probably correct. 14. Support from New Civil Engineering Article An article in the journal New Civil Engineering (NCE) has come to my attention at the end of the draft-process which lends support to concerns about the NIST analysis of the WTC collapses. It states: World Trade Center disaster investigators [at NIST] are refusing to show computer visualizations of the collapse of the Twin Towers despite calls from leading structural and fire engineers, NCE has learned. Visualisations of collapse mechanisms are routinely used to validate the type of finite element analysis model used by the [NIST] investigators. The collapse mechanism and the role played by the hat truss at the top of the tower has been the focus of debate since the US National Institute of Standards & Technology (NIST) published its findings…. University of Manchester [U.K.] professor of structural engineering Colin Bailey said there was a lot to be gained from visualising the structural response. “NIST should really show the visualisations; otherwise the opportunity to correlate them back to the video evidence and identify any errors in the modeling will be lost,” he said…. A leading US structural engineer said NIST had obviously devoted enormous resources to the development of the impact and fire models. “By comparison the global structural model is not as sophisticated,” he said. “The software used [by NIST] has been pushed to new limits, and there have been a lot of simplifications, extrapolations and judgment calls.” (Parker, 2005; emphasis added.) Here we have serious concerns about the NIST WTC collapse report raised by structural and fire engineers, augmenting the arguments raised here by a physicist. |
|
#115
|
|||
|
|||
|
|
|
#116
|
|||
|
|||
|
In article ,
TRUTH wrote: Perhaps to learn clues to prevent a complete, freefall "fire induced" collapse from happening again, especially since: It never happened before, but on 9/11 it happened three times. An executive in the WTC Management said in his opinion the Towers could withstand multiple 707 impacts, and compared it to a pencil puncturing a screen netting. Firefighters made it up to the impact area of the South Tower and suggested nothing major. And -- White Star proclaimed the Titanic to be "unsinkable", too. Also, are you aware that NIST literally "changed" the data in their computer simulation to get the Towers to collapse? And now they refuse to show the simulations to leading fire engineers who call for them. That is what you do when analysing any kind of system failure or test. When you perform a test or failure analysis, you build a computer model, as best you can, and then change paramaters until you duplicate the observed phenomena. Of course, you would change the data (weaken or remove structural members from the simulation, etc.) until you get an understanding of what actually failed. I doubt that fire engineers would understand the dynamics of structural failure -- they are interested (and trained) in fireproofing, firefighting and fire prevention -- not how a building came down when hit by the equivalent of a 1KT weapon. |
|
#117
|
|||
|
|||
|
|
|
#118
|
|||
|
|||
|
|
|
#119
|
|||
|
|||
|
In article ,
on 14 Mar 2006 18:02:06 GMT, Laurence Doering attempted to say ..... On Fri, 10 Mar 2006 23:15:27 -0500, Scott M. Kozel wrote: "Wake UP!" wrote: Video of THERMITE REACTION at WTC on 9/11 http://www.checktheevidence.com/911/Thermite.htm That most likely is melting aluminum. It has been said to be likely that aircraft wreckage piled up in that corner of the South Tower. You don't even need aircraft wreckage for aluminum to have been the source of the sparks and apparently molten material. The external metal sheathing on the World Trade Center towers was an aluminum alloy [1]. Aluminum's melting point is around 1,200 degrees F, a temperature that's easily reached in building fires. Add the tons of material in office partitions and furniture. Not to mention the plastics. -- When dealing with propaganda terminology one sometimes always speaks in variable absolutes. This is not to be mistaken for an unbiased slant. |
|
#120
|
|||
|
|||
|
TRUTH wrote:
Dan wrote in news:HX2Sf.61662$Ug4.7991@dukeread12: TRUTH wrote: "Keith W" wrote in : "Wake Up!" wrote in message ... "Keith W" wrote in : The behaviour of steel in fire hasnt changed in 60 years and yes they were complete collapses I can cite other cases, the Hotel York in Redcar England was a 15 storey steel framed hotel that collapsed after a fire for example Based on the following quote from Jones' paper, it can be assumed that the collapses you mention above are not relevant to the current situation: No they are vidence of how full of **** Jones is. A New York Times article entitled “Engineers are baffled over the collapse of 7 WTC; Steel members have been partly evaporated,” provides relevant data. Experts said no building like it [WTC7], a modern, steel-reinforced high-rise, had ever collapsed because of an uncontrolled fire. (Glanz, 2001; emphasis added.) And they were wrong Fire engineering expert Norman Glover agrees: Almost all large buildings will be the location for a major fire in their useful life. No major high-rise building has ever collapsed from fire… The WTC [itself] was the location for such a fire in 1975; however, the building survived with minor damage and was repaired and returned to service.” (Glover, 2002) That fire was confined to approx half of a single floor rather than several floors and the building had not been damaged by a major impact. That makes a difference That’s correct – no steel-beam high-rise had ever before (or since) completely collapsed due to fires! Incorrect, I have given examples that you choose to ignore However, such complete and nearly symmetrical collapses in tall steel-frame buildings have occurred many times before -- all of them due to pre-positioned explosives in a procedure called “implosion” or controlled demolition. Which requires weeks of careful preparation by large work teams, none of whom were in evidence at the WTC snip The Towers' implosions were not typical. They were detonated top down. Therefore, any engineer truncating the investigation at collapse initiation will not see the evidence. You dont use explsoives to demolish buildings from the top down, you blow out the lower floors and some intermediate floors in a timed sequence Except when demolishing unique structures like the Twin Towers. Besides, the government couldn't make controlled demolitions *too* obvious You never did answer my question: how did they hide the preparations required for a controlled demolition? Where did they put all the debris they would have had to remove in preparation? How come no one noticed a daily line of dump trucks hauling away the debris? Remember walls, windows, and structural members are always removed in preparation for controlled demolitions. What about all the structural members that had to be weakened with torch cuts? How about the several thousands of feet of det cord and charges placed in plain view? It would have taken weeks and much manpower just to prepare the buildings. How come no one noticed? Why do you keep refusing to answer? The only info I have is the power down in the South Tower: http://69.28.73.17/thornarticles/powerdown.html http://killtown.blogspot.com/2005/12...interview.html In other words you can't answer my questions. A "power down" does not indicate anything sinister. Are you trying to tell us "they" did a few week's work in less that 24 hours? Even if "they" could who made all the debris vanish and why didn't anyone notice the prepwork Monday morning? Do you not see why your theory makes no sense whatever? Also, GWB's brother Marvin, and a cousin were executives in the WTC's security company And his brother Jeb is governor of Florida and his wife was a librarian and his mother has gray hair and the sun was shining that day and Alaska has ice...etc. So what? By your tone / name calling, you sound a bit upset. Perhaps because you think there's something to Jones' claims afterall? I noticed you snipped out one of Jones' main points from my response, regarding NIST not performing analysis after collapse inituation. You have a history of name calling yourself. Only in direct retaliation. Negative. Why would NIST need to do an analysis after initiation of collapse when they already proved what how it started? It was simply a chain reaction. Dan, U.S. Air Force, retired Perhaps to learn clues to prevent a complete, freefall "fire induced" collapse from happening again, especially since: It never happened before, but on 9/11 it happened three times. An executive in the WTC Management said in his opinion the Towers could withstand multiple 707 impacts, and compared it to a pencil puncturing a screen netting. Firefighters made it up to the impact area of the South Tower and suggested nothing major. Already addressed. Also, are you aware that NIST literally "changed" the data in their computer simulation to get the Towers to collapse? And now they refuse to show the simulations to leading fire engineers who call for them. I bet they did change data entries. It's part of what one does in simulations. Once they duplicate what happened they will know what caused it by the data they entered. You are not conversant in this area so I suggest you accept the responses from the experts you keep asking. From Jones' paper: http://www.physics.byu.edu/research/energy/htm7.html Let me try to explain this again. His paper has been debunked many times. He may be a physicist but he is a theoretical physicist as opposed to a structural engineer who uses applied physics. Jones is a fool and so is anyone who uses his paper as a basis for disbelieving the government's story. You keep asking for expert opinion then blowing off what you hear. By your own admission you don't understand the science and math involved yet you doubt those of us who do. Remember when you tried to tell us jetliners use diesel fuel, a squib is a puff of smoke, the ground is not visible from 34,000 feet etc? You are really coming across as a bit silly in all this. Dan, U.S. Air Force, retired |
| Thread Tools | |
| Display Modes | |
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| UAV's and TFR's along the Mexico boarder | John Doe | Piloting | 145 | March 31st 06 07:58 PM |
| American nazi pond scum, version two | bushite kills bushite | Naval Aviation | 0 | December 21st 04 11:46 PM |
| Hey! What fun!! Let's let them kill ourselves!!! | [email protected] | Naval Aviation | 2 | December 17th 04 10:45 PM |
| ~ 5-MINUTE VIDEO OF BUSH THE MORNING OF 9/11 ~ | B2431 | Military Aviation | 0 | March 27th 04 05:46 AM |