Quote: Originally Posted by CDNBear
Aren't elevator doors thin sheet metal doors that can not, could not hold up against that kind of pressure?
Yes they are, thin, sheet metal doors. Unable to hold up to the pressure that came down that shaft. The mechanism that closes them isn't a vault type mechanism either.
They're simple doors to stop people from falling down the shaft, not stop a building from blowing through them.
Don't elevator doors close together..? ,not swing open like ordinary doors, are you telling me that they blow open like a swing door because of the air pressure, cos it would take tremendous pressure to do that, and your theory sucks any how your just presuming that's what happen, and it ain't true and YOU KNOW IT .
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Frequently Asked Questions: Controlled Demolition
9-11 Research provides abundant evidence and analysis concerning the total destruction of the Twin Towers and Building 7. See this directory. We think that the evidence strongly supports the conclusion that all three buildings were destroyed by planned demolitions, and were not the result of plane crashes and fires. The following questions are frequently asked by people encountering the idea of the controlled demolition of the World Trade Center buildings. Other questions are addressed in other FAQs. Supposing that Building 7 was brought down by controlled demolition. Doesn't the fact that the Twin Towers came down in such a different fashion prove that they were not destroyed by controlled demolition?
How could the Twin Towers, with so many tenants, and so many columns (240 perimeter columns, and 47 core columns) be wired for a controlled demolition without the...
911research.wtc7.net/faq/demolition.html (external - login to view)
Supposing that Building 7 was brought down by controlled demolition. Doesn't the fact that the Twin Towers came down in such a different fashion prove that they were not destroyed by controlled demolition?
Controlled demolitions can be engineered in many different ways. Normally, the purpose of a controlled demolition is to remove a structure while avoiding damage to adjacent structures, and to do so economically. Typically, a tall building is demolished by placing thousands of cutter charges adjacent to columns throughout the building, then detonating them in a precise order, starting with interior structures, and progressing outward and upward. Destroying the interior columns allows unsupported weight to pull the exterior inward, and destroying the building from the ground up allows the weight of the building to be harnessed to do much of the destruction. The result is an implosion, producing a vertical collapse and a consolidated rubble pile.
The objective of controlled demolition applied to the Twin Towers was the decidedly different one of producing collapses that could be explained as having been caused by the aircraft crashes and fire damage. Hence, the destruction was started around the crash zones and then moved downward.
How could the Twin Towers, with so many tenants, and so many columns (240 perimeter columns, and 47 core columns) be wired for a controlled demolition without the operation being noticed?
This question, like the previous one, assumes that the demolition of the Twin Towers would have to look like a conventional one, with fuses and large numbers of cutting charges. First, understand that the demolitions could have been engineered using wireless operations. Attack Scenario 404 (external - login to view)
describes how the charges could have been activated via radio signals in a precise fashion controlled by a computer. Second, the demolitions may have been achieved without accessing the perimeter columns. The fact that the Twin Towers exploded into vast clouds of pulverized concrete, hurling steel assemblies up to 500 feet in all directions shows that they were destroyed with much more energy than a conventional demolition -- perhaps two orders of magnitude more. That gave the planners much more leeway in the placement of charges required to totally destroy the buildings. The core structures contained the building services such as elevators, and plumbing and cabling shafts. It would have been easy for people who controlled building security (external - login to view)
to surreptitiously install devices in hidden portions of the cores.
How could charges have been pre-positioned in the Towers in such a way that the plane crashes and fires wouldn't have set them off?
There are several possible answers to this. First, some charges may indeed have been set off by the crashes but masked by the huge fireballs created by the combustion of aerosolized jet fuel. Second, the charges could have been arranged so as to avoid the regions that the attack planners expected to take direct hits from the aircraft. Assuming that the jetliners were being flown by autopilot at the times of their impacts, the GPS navigation systems could have kept the targeting error margin to within a few feet. Third, explosives can be engineered so that heat alone will not detonate them. The plastic explosive C4, for example, requires the simultaneous delivery of high heat and pressure to induce detonation. Fourth, it is relatively easy to design casings for explosives that would allow them to survive even the most violent assaults. Consider that the black boxes (external - login to view)
that store aircrafts' voice and data recorders protect their contents from impact accelerations of 3,400 Gs and from temperatures of 2,000 F for up to 30 minutes.
Even if the Twin Towers were destroyed by explosives, is it correct to call them controlled demolitions when they don't look anything like cases previously seen? And what was controlled about the Towers being exploded?
The collapses were very chaotic events which don't look very controlled. However, they must have been carefully engineered. In addition to having to determine the quantities and placement of explosives necessary to achieve the total destruction of the Towers, the planners had to plan the timing of their detonations with some precision. It is clear from photographs (external - login to view)
and videos (external - login to view)
of the Towers' destruction that the zones of destruction moved downward at about the same rates as the exploding rubble clouds descended, so that these zones remained concealed by the clouds. If these zones of destruction moved either too quickly or too slowly, they would would have become visible below or above the rubble clouds, blatantly contradicting the official account of gravity-driven collapses.
Does the controlled demolition of the Twin Towers by insiders necessarily mean that the attack was an inside job? Is is possible that the Towers were prepared for demolition years in advance as part of a contingency plan to bring the towers down symmetrically should a terrorist attack threaten to topple them?
This theory is not even remotely plausible. First, such a plan would be highly illegal and require a level of secrecy on par with the engineering of the attack itself. Any leak of the plan to reporters, law enforcement, insurance companies, or tenants would empty the Trade Center and trigger an avalanche of lawsuits. Who would work in a skyscraper laced with bombs?
Second, there would be no rationale for such a plan, since no skyscraper had ever collapsed. The 1993 garage bombing (external - login to view)
did not even come close to threatening Towers' structural integrity. Third, whoever made the decision to trigger the demolitions did so knowing there were hundreds of firefighters, and perhaps thousands of civilians, still alive within the Towers. Since adjacent buildings had been evacuated, that decision was an act of mass homicide with no conceivable justification in lives or property saved. Fourth, any plan to destroy the Towers as a safety precaution would presumably have looked something like a conventional demolition, with charges starting at ground level -- not at specific points near the tops that happened to correspond to the plane crashes.