simple question for the WTC collapse

WOW! Your sticking by this are you? How can you explain the WTC 7 owner saying they decided to "Pull it", a common building demolition term.

[ame=http://www.youtube.com/watch?v=XnO3B0LCwUo]Larry Silverstein Says He Suggested Pulling The Building - YouTube[/ame]
 
WOW! Your sticking by this are you? How can you explain the WTC 7 owner saying they decided to "Pull it", a common building demolition term.

Larry Silverstein Says He Suggested Pulling The Building - YouTube

Pull the fire fighters out of the area.
It's a common term when you want to get people out of an area.


He said, "We made the decision to pull it" not pull them.

Pulled during a no-hitter


It’s hard to imagine many situations in which a manager would pull a pitcher with a no-hitter going, but it has happened 14 times in New York Mets history.

Pulled during a no-hitter | Mets No-Hitters History at NoNoHitters.com
 
1. The aluminum from the plane would have become molten since it melts at relatively low temperatures. It was probably shipped directly to a recycling center if the did find any.

2. You are correct that the planes created the fatal damage. The buildings would have had to be condemned if they had remained upright because of the structural damage to the core could not have been repaired. Building 7 was damaged by the collapse of the towers and then the fire weakened the bridge structure over the burning substation.

5. The phone calls from the planes went to voice mail.

stop with your substation bullshit..you are in contradiction with the NIST report

The FACTS about WTC 7 are not in dispute.

7 World Trade Center - Wikipedia, the free encyclopedia

The original 7 World Trade Center was 47 stories tall, clad in red exterior masonry, and occupied a trapezoidal footprint. An elevated walkway connected the building to the World Trade Center plaza. The building was situated above a Consolidated Edison (Con Ed) power substation, which imposed unique structural design constraints. When the building opened in 1987, Silverstein had difficulties attracting tenants. In 1988, Salomon Brothers signed a long-term lease, and became the main tenants of the building. On September 11, 2001, 7 WTC was damaged by debris when the nearby North Tower of the World Trade Center collapsed. The debris also ignited fires, which continued to burn throughout the afternoon on lower floors of the building. The building's internal fire suppression system lacked water pressure to fight the fires, and the building collapsed completely at 5:21:10 pm.[2] The collapse began when a critical internal column buckled and triggered structural failure throughout, which was first visible from the exterior with the crumbling of a rooftop penthouse structure at 5:20:33 pm.

Image showing "bridge style" construction over the substation.
800px-Wtc7_transfer_trusses.png


NIST Explanation for the collapse.

In November 2008, NIST released its final report on the causes of the collapse of 7 World Trade Center.[9] This followed NIST's August 21, 2008, draft report which included a period for public comments.[36] In its investigation, NIST utilized ANSYS to model events leading up to collapse initiation and LS-DYNA models to simulate the global response to the initiating events.[45] NIST determined that diesel fuel did not play an important role, nor did the structural damage from the collapse of the Twin Towers, nor did the transfer elements (trusses, girders, and cantilever overhangs). But the lack of water to fight the fire was an important factor. The fires burned out of control during the afternoon, causing floor beams near column 79 to expand and push a key girder off its seat, triggering the floors to fail around column 79 on Floors 8 to 14. With a loss of lateral support across nine floors, column 79 buckled – pulling the east penthouse and nearby columns down with it. With the buckling of these critical columns, the collapse then progressed east-to-west across the core, ultimately overloading the perimeter support, which buckled between Floors 7 and 17, causing the remaining portion of the building above to fall downward as a single unit. The fires, fueled by office contents, along with the lack of water, were the key reasons for the collapse.[9]

The fire that burned out of control caused the floors to expand and and push a key girder out of alignment. The loss of support resulted in a buckling and that was the trigger that brought down the entire building.

That scenario is entirely consistent with the plausible one that I have provided for the towers themselves.

Perhaps you might try enrolling in a basic applied mathematics course at your local community college.

That is WIKKI ..not the NIST report...what are you going to post next popular mechanics ?...NIST determined the substation was irrelevant to the collapse and the design of wtc 7 was never called into question ..engineers and physics professors with vastly more knowledge than your self find the NIST theory ludicrous are you suggesting they need to take a math class ?
 
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Lon J. Waters, PhD Mathematics – Former staff member of the Maui High Performance Computing Center, a U.S. Department of Defense funded high performance computing and research facility. Former staff member of Sandia National Laboratories, a major research facility of the National Nuclear Security Administration, U.S. Department of Energy. Member Advisory Editorial Board, Journal of 9/11 Studies.


Signatory of Petition of Solidarity to the Attorney General of New York for a new independent grand jury investigation of 9/11 11/19/04: "We the undersigned: a) think that there is ample evidence and probable cause to believe that many grave and still unresolved crimes were committed by US officials prior to, during and after the events of 9/11; b) observe that most of these apparent crimes, including but not limited to abetment of mass murder, criminal negligence, insider trading, and obstruction of justice fall well within the jurisdiction of New York's top law enforcement officials ..." Justice for 9/11 -- Solidarity Petition -- [www.Justicefor911.org]


Signatory: Petition requesting a reinvestigation of 9/1
 
avid L. Griscom, PhD – Research physicist, retired in 2001 from Naval Research Laboratory (NRL) in Washington, DC, after 33 years service. Fellow of the American Physical Society. Fulbright-García Robles Fellow at Universidad Nacional Autónoma de México in Mexico City (1997). Visiting professorships of research at the Universities of Paris and Saint-Etienne, France, and Tokyo Institute of Technology (2000 - 2003). Adjunct Professor of Materials Science and Engineering, University of Arizona (2004 - 2005). Winner of the 1993 N. F. Mott Award sponsored by the Journal of Non-Crystalline Solids, the 1995 Otto Schott Award offered by the Carl-Zeiss-Stiftung (Germany), a 1996 Outstanding Graduate School Alumnus Award at Brown University, and the 1997 Sigma Xi Pure Science Award at NRL. Principal author of 109 of his 185 published works, a body of work which is highly cited by his peers. Officially credited with largest number of papers (5) by any author on list of 100 most cited articles authored at NRL between 1973 and 1988.


Personal blog 1/5/07: "David Ray Griffin has web-published a splendid, highly footnoted account of The Destruction of the World Trade Center: Why the Official Account Cannot Be True: This scholarly work, rich in eyewitness accounts, includes 11 separate pieces of evidence that the World Trade Center towers 1, 2 [each 1300+ feet tall, 110 stories], and 7 were brought down by explosives. [Editor's note: WTC Building 7 was 610 feet tall, 47 stories. It would have been the tallest building in 33 states. Although it was not hit by an airplane, it completely collapsed into a pile of rubble in less than 7 seconds at 5:20 p.m. on 9/11, seven hours after the collapses of the Twin Towers. However, no mention of its collapse appears in the 9/11 Commission's "full and complete account of the circumstances surrounding the September 11, 2001 terrorist attacks." Watch the collapse video here. And six years after 9/11, the Federal government has yet to publish its promised final report that explains the cause of its collapse.]

http://patriotsquestion911.com/
 

:cuckoo: That debunked video is full of idiots & bullshit. Not one picture of molten steel. Maybe some red hot sheet metal or other substance, but no molten steel. That 9/11 cross was not molten steel fused during the collapse. Close up photos & documentation show it was factory made that way as a prefabricated part of the building structure. :lol:

So these first responders and engineers are in in fact idiots and you debwunked them how exactly...?
 
WOW! Your sticking by this are you? How can you explain the WTC 7 owner saying they decided to "Pull it", a common building demolition term.

Larry Silverstein Says He Suggested Pulling The Building - YouTube

Now that's true Pull it would be a common demo term...Building 6 was pulled.... It involves steel cables being attached to certain parts of the building and the building pulled down....Is this what you think they did to Bldg 7?

Why would firefighters on the scene say otherwise?

WTC 7 - Silverstein's 'Pull It' Explanation Examined
 
A 10-lb sledge hammer dropping 1 story or 10-ft creates a force of 10,000-lbs. That is 1,000 times the force the it took just to hold the hammer static in the air. The same goes for the building. The tower was built to hold less than 20 times its static downward force load at a given height. Now dropping a portion of the building 10-ft increased the downward force by 1,000 times. The aircraft took out 3 floors, So that initial collapse impact was likely after a 30 foot drop.

On top of that for every crushed floor the moving mass gained weight & mass. This kept on increasing the force as the building fell. So a building built to hold 20 times it's weight will give very little resistance to slow a force of 1,000 times it's weight.

A one pound hammer can sit on 60,000 psi steel for ever & never dent it. But when swung & strikes the 60,000 psi steel it dents it because it hits with a force greater than 60,000 psi.

rectangle_hammered_stainless_steel_blanks_-_3_hand_stamped_tags_for_pe_8e18a499.jpg


A hammer is a force amplifier that works by converting mechanical work into kinetic energy and back.

In the swing that precedes each blow, a certain amount of kinetic energy gets stored in the hammer's head, equal to the length D of the swing times the force f produced by the muscles of the arm and by gravity. When the hammer strikes, the head gets stopped by an opposite force coming from the target; which is equal and opposite to the force applied by the head to the target. If the target is a hard and heavy object, or if it is resting on some sort of anvil, the head can travel only a very short distance d before stopping. Since the stopping force F times that distance must be equal to the head's kinetic energy, it follows that F will be much greater than the original driving force f — roughly, by a factor D/d. In this way, great strength is not needed to produce a force strong enough to bend steel, or crack the hardest stone.

Effect of the head's mass - The amount of energy delivered to the target by the hammer-blow is equivalent to one half the mass of the head times the square of the head's speed at the time of impact (E={mv^2 \over 2}). While the energy delivered to the target increases linearly with mass, it increases quadratically with the speed.
 
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I can not understand how anyone could listen to John Gross and not hear his dishonesty

[ame=http://www.youtube.com/watch?v=HVFwkAMd2-k]9//11 NIST denies evidence of molten steel at the WTC Site (compilation) - YouTube[/ame]
 
A 10-lb sledge hammer dropping 1 story or 10-ft creates a force of 10,000-lbs. That is 1,000 times the force the it took just to hold the hammer static in the air. The same goes for the building. The tower was built to hold less than 20 times its static downward force load at a given height. Now dropping a portion of the building 10-ft increased the downward force by 1,000 times. The aircraft took out 3 floors, So that initial collapse impact was likely after a 30 foot drop.

On top of that for every crushed floor the moving mass gained weight & mass. This kept on increasing the force as the building fell. So a building built to hold 20 times it's weight will give very little resistance to slow a force of 1,000 times it's weight.

A one pound hammer can dent 60,000 psi steel because it hits with a force greater than 60,000 psi.

rectangle_hammered_stainless_steel_blanks_-_3_hand_stamped_tags_for_pe_8e18a499.jpg


A hammer is a force amplifier that works by converting mechanical work into kinetic energy and back.

In the swing that precedes each blow, a certain amount of kinetic energy gets stored in the hammer's head, equal to the length D of the swing times the force f produced by the muscles of the arm and by gravity. When the hammer strikes, the head gets stopped by an opposite force coming from the target; which is equal and opposite to the force applied by the head to the target. If the target is a hard and heavy object, or if it is resting on some sort of anvil, the head can travel only a very short distance d before stopping. Since the stopping force F times that distance must be equal to the head's kinetic energy, it follows that F will be much greater than the original driving force f — roughly, by a factor D/d. In this way, great strength is not needed to produce a force strong enough to bend steel, or crack the hardest stone.

Effect of the head's mass - The amount of energy delivered to the target by the hammer-blow is equivalent to one half the mass of the head times the square of the head's speed at the time of impact (E={mv^2 \over 2}). While the energy delivered to the target increases linearly with mass, it increases quadratically with the speed.

there was no pancaking the top half was already disintegrating as it fell and much of the debris and pulverized concrete was projected outward so it could not have gained weight & mass with every crushed floor. the moving mass there was met with a huge solid structure that would of offered a lot of resistance

 
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:cuckoo: That debunked video is full of idiots & bullshit. Not one picture of molten steel. Maybe some red hot sheet metal or other substance, but no molten steel. That 9/11 cross was not molten steel fused during the collapse. Close up photos & documentation show it was factory made that way as a prefabricated part of the building structure. :lol:

So these first responders and engineers are in in fact idiots and you debwunked them how exactly...?

This video has been debunked countless times just like free fall was debunked. Firemen are not engineers. The people in that video are clueless & show no evidence to back their claims. They confused molten metal with molten steel. They lied about the I-beam cross being 2 separate steel beams that were fused together during the collapse. You are an idiot for believing that crap.
 
A 10-lb sledge hammer dropping 1 story or 10-ft creates a force of 10,000-lbs. That is 1,000 times the force the it took just to hold the hammer static in the air. The same goes for the building. The tower was built to hold less than 20 times its static downward force load at a given height. Now dropping a portion of the building 10-ft increased the downward force by 1,000 times. The aircraft took out 3 floors, So that initial collapse impact was likely after a 30 foot drop.

On top of that for every crushed floor the moving mass gained weight & mass. This kept on increasing the force as the building fell. So a building built to hold 20 times it's weight will give very little resistance to slow a force of 1,000 times it's weight.

A one pound hammer can dent 60,000 psi steel because it hits with a force greater than 60,000 psi.

rectangle_hammered_stainless_steel_blanks_-_3_hand_stamped_tags_for_pe_8e18a499.jpg


A hammer is a force amplifier that works by converting mechanical work into kinetic energy and back.

In the swing that precedes each blow, a certain amount of kinetic energy gets stored in the hammer's head, equal to the length D of the swing times the force f produced by the muscles of the arm and by gravity. When the hammer strikes, the head gets stopped by an opposite force coming from the target; which is equal and opposite to the force applied by the head to the target. If the target is a hard and heavy object, or if it is resting on some sort of anvil, the head can travel only a very short distance d before stopping. Since the stopping force F times that distance must be equal to the head's kinetic energy, it follows that F will be much greater than the original driving force f — roughly, by a factor D/d. In this way, great strength is not needed to produce a force strong enough to bend steel, or crack the hardest stone.

Effect of the head's mass - The amount of energy delivered to the target by the hammer-blow is equivalent to one half the mass of the head times the square of the head's speed at the time of impact (E={mv^2 \over 2}). While the energy delivered to the target increases linearly with mass, it increases quadratically with the speed.

there was no pancaking the top half was already disintegrating as it fell and much of the debris and pulverized concrete was projected outward so it could not have gained weight & mass with every crushed floor the moving mass there was met with a huge solid structure that would of offered a lot of resistance

[ame=http://www.youtube.com/watch?v=tejFUDlV81w]9/11 Experiments: Newton vs. NIST - YouTube[/ame]

:cuckoo: This guy is deceiving you & you fell for it sucker. 1,000 x force resisted by a 20 x force will only slightly slow it's acceleration rate. The faster the fall, the more force is generated.
 
:cuckoo: That debunked video is full of idiots & bullshit. Not one picture of molten steel. Maybe some red hot sheet metal or other substance, but no molten steel. That 9/11 cross was not molten steel fused during the collapse. Close up photos & documentation show it was factory made that way as a prefabricated part of the building structure. :lol:

So these first responders and engineers are in in fact idiots and you debwunked them how exactly...?

This video has been debunked countless times just like free fall was debunked. Firemen are not engineers. The people in that video are clueless & show no evidence to back their claims. They confused molten metal with molten steel. They lied about the I-beam cross being 2 separate steel beams that were fused together during the collapse. You are an idiot for believing that crap.

the preacher had no Idea what he was talking about that is true but I think an Iron worker knows a steel girder when he sees one and even more so when its multiple Iron workers and You are an idiot for discounting all of these eyewitnesses in favor of what John Gross tells you
 
the wacky cross story was one perpetrated by the 9 /11 propaganda machine not those seriously questioning 9/11..its a "feel good "myth they still perpetrate to this day putting it in the 9/11 museum still claiming its two beams fused..when it clearly is not..it actually a perfect example of how little people think or question what they are told by the "official sources"
[ame=http://www.youtube.com/watch?v=tvVMDAxhsgc]WTC Cross Added to 9/11 Museum (7.23.11) - YouTube[/ame]
 

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