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Originally posted by Leo Strauss
Did NIST edit the footage to hide implosion??? My opinion is no, I think the timer was added by NIST to study the collapse.
Originally posted by GenRadek
reply to post by ANOK
No ANOK, all you did was show how an implosion brings down a building. You did not explain how it is impossible to have the same reaction from structural failure from fires, at all. All you essentially said was, Because I said so.
Sometimes, though, a building is surrounded by structures that must be preserved. In this case, the blasters proceed with a true implosion, demolishing the building so that it collapses straight down into its own footprint (the total area at the base of the building). This feat requires such skill that only a handful of demolition companies in the world will attempt it.
Blasters approach each project a little differently, but the basic idea is to think of the building as a collection of separate towers. The blasters set the explosives so that each "tower" falls toward the center of the building, in roughly the same way that they would set the explosives to topple a single structure to the side. When the explosives are detonated in the right order, the toppling towers crash against each other, and all of the rubble collects at the center of the building. Another option is to detonate the columns at the center of the building before the other columns so that the building's sides fall inward.
GenRadek :Oh and that video you speak of with the firefighters supposedly hearing an explosion from WTC7, didnt you notice how the audio of the video itself is in mono while the explosion itself is in stereo? How does that happen VRYA?
GeneralRadek : And again ANOK, its already been explained to you. When columns 79 I believe failed, causing the penthouse to collapse into WTC7, where do you think it went? Fell down and began the internal collapses. A few seconds after that, the exterior shell fell over and into the hole left by the internal collapses earlier. Again, are you or are you not aware of just how WTC7 was designed and those pesky transfer trusses used for the floors over the Coned substation's levels? Also recall the fact that according to seismic data, the building was having internal collapses for 18 seconds in total. A building is not a solid block that will fall in one unit. We are dealing with steel beams, steel bolt connections, welds, they are not going to all in one solid piece move down. They are going to deform, fail, putting more stresses on the surrounding steel sections until they all start failing, and that is called a global collapse.
It was 8.4 seconds between the first visible on video, dent in the eastern penthouse on the roof of WTC 7, and the onset of GLOBAL WTC 7 collapse. Not 18 seconds! Always try to get your facts right.
Also recall the fact that according to seismic data, the building was having internal collapses for 18 seconds in total.
The time for convincing people of the reality of 9-11 is probably obsolete at this point. I have had these discussions with about every person I can get a hold of and in the end most are too mentally lazy to even think about the implications.
GenRadek : Why is it that not one seismologist has discovered any explosive traits in the data? Not one. I'm not interested in the armchair sleuths and what they discover in their mom's basement while staring at YT videos claiming they "found" evidence of bombs. I'm talking about actual professional seismologists who could interpret the data properly. Why arent they mentioning any explosive signatures?
Conclusion
At the moment of the impact by the planes on the Twin Towers and their collapse, as well as that of WTC7, seismic waves were generated. To the degree that (1) seismic waves are only created by brief impulses, and (2) that low frequencies are associated with an energy (magnitude) that is comparable to a seismic event, these waves undeniably have an explosive origin. Even if the planes' impact and the fall of the debris from the Towers onto the ground could have generated seismic waves, their magnitude was insufficient to be recorded 34 km away, and they should have been similar.
However, the composition and magnitude of the seismic signals show significant differences, above all in their propagation speed, even though their paths were identical under identical conditions. This last difference being physically unexplainable in the official version, we must put into question the calculation of the speeds effectuated from the origin shown on the video images. We can only conclude that in reality, the (explosive) source was manually detonated, thus accounting for the variable shift for each origin in relation to the videos.
The composition of the waves is revealing both in terms of the location of the source and the magnitude of the energy transmitted to the ground. The subterranean origin of the waves emitted when WTC1 collapsed is attested by the presence of the P and S volume waves along with the Rayleigh surface waves, which are present in all five explosions. The placement of the source of the four other explosions is sub-aerial, attested by the unique presence of Rayleigh waves. The aerial explosions visible on the videos of the upper floors of the Twin Towers do not produce seismic waves 34 km from the source.
There is a factor of ten between the power of the explosions at the time of the impacts on the twin Towers (as well as at the time of the collapse of WTC7) and the strength of those more powerful ones at the time of their collapse, the subterranean explosion under WTC1 being the one that transmitted the most energy to the ground.
Note as well that the degree to which the surface waves disperse (their speed depends upon their frequency), the duration of the recorded signal is not representative of the duration of the signal at the source.
Finally, the controlled demolition of the three towers, suggested by the visual and audio testimony, as well as by observations of their collapse, is thus demonstrated by the analysis of the seismic waves emitted at the moments of the plane impacts and at the moments of the collapse.
How would you be able to tell a structural failure collapse of a building from an implosion?
GenRadek : However, LaBTop, I am sure that you are at least aware of the design peculiarity with WTC7? In particular the transfer trusses over the ConEd substation creating that large open space at the base? Couldnt that open space been responsible?