14-08-2013, 12:42 AM
Tony Szamboti Wrote:I said to cause a self-propagating collapse of the floors (meaning the floor slabs outside of the core as implied by ROOSD) would require at least five floors to fall on one floor before it could be self-sustaining. That can't happen in the beginning of the collapse and you can't dump the entire 12 story upper section on the floor slab as there are columns in the way in a natural collapse. Getting those five floor slabs would require the collapse of at least five stories of columns. Now there is a problem as the columns should have provided significant resistance. They did not and it appears they weren't even involved in resisting the collapse. Why not?
Of course, some like to say the columns would have missed each other. However, the upper section would not just shift over without an enormous lateral load on it. There is no lateral load on it as gravity is a vertical load, and the small tilt provides very little lateral load component.
I think you are playing word games. There's no doubt from the video that at some point the 12 storey top section releases and drops. You even said the fall initiated at the 98th floor. Therefore when the top section dropped at some point 12 storeys of top section hit the bottom section and transferred the weight and mass of that top section to the one below. Since it is likely the failure of the inner core in the top section released the floors in that section, when the top section hit the bottom section it almost certainly released its floor sections onto the floor sections below. Plus the inner core failure in the top section probably pulled-in the outer frame and drove the outside walls with force into the floor section seats below as well. By all definitions we are well within your 5 floors of weight threshold you calculate to initiate ROOSD.
What columns were in the way of a natural collapse? If the giving way of the top section showed a crumbling of the inner core what columns would be there to restrain the dumping of the top 12 floor sections on to those below them? The drop of the antenna first should indicate that the inner core from 98 to the roof had failed therefore releasing the contents of the section downward. You yourself said the event was initiated at the 98th floor with controlled demolition charges. Since the antenna dropped first the only possibility would be the core dropping from 98 to the roof. The core columns did not resist the collapse because they were fatally compromised through airliner impact and fire. The columns didn't need to shift over because many of them were severed as the Perdue simulation shows. You are juggling hypothetical resistance of columns while not really directly answering the questions. You're equivocating. The basis of your equivocation being the assumption of CD which in turn is being used to avoid answering what the video shows right in front of you.