the concrete used in the towers on every floor is different type of concrete that what you normally see everywhere..did you know there are over 150 types of concrete mixes?...the mix used on the floors in the towers is made to crumble very easily...if it were on the ground and you drove a truck on it , it would shatter...
Even more reason to have the concrete dissipate energy in the course of the collapse the upper mass impacts a floor, and when it does, breaks up the floor and the small bits drop through the spaces in the steel reinforcing that was installed in each deck. The net result would be a quantity of material would be able to drop through a given level without having to break the floor trusses, and in fact what scenario is it where the floor trusses must be totally disconnected from the outer wall & core in order to produce the result? If ( and it is logical to conclude .... ) the floor trusses were not ALL disconnected, then what sort of outcome could you expect to see?
as each floor collapses it will add weight to the next floor putting more stress on the floor joist on the lower floor...as the concrete crumbles the weight will still be the same..some might be lost from being blown out the window or sides of the building but it would still be close enough to add the total weight of each floor..as the weight increases the bolts and welds would be overstressed and then fail also
The critical point being that given an overload condition to any one floor, will ALL of the bolts & welds break at the same time?
no ...but as the floors fall on each other the weight will make them fall...and as the weight grows then they collapse faster..as the weight increases the time will be closer..it could be just seconds apart after awhile...
OK, lets look at that .... as an average, the floors took 0.11 sec to disintegrate and since the "collapse" event started out slow, and accelerated as it descended, the disintegration of each floor took less than 0.11 sec lower down the tower. its a given that the upper mass was not a hardened steel punch with a uniform face, because of the "airliner" crash therefore the forces imposed on the floors below could not be expected to be uniform in nature. and given the probabilities of the whole business, it can NOT be expected at all to have all of the trusses and all of the connections within any given floor to fail completely and simultaneously. What incantation of black magic could cause this sort of thing?
if the connections didn't fail simultaneously, why then did the "collapse" event progress all the way to ground level taking with it all 110 stories?
Gravity. The ground was where it was heading. The advancing mass grew larger and larger and each individual floor was destroyed by it, one by one.
The mass that was on top of the as yet undamaged part of the tower(s) would have to remain on top in order to do the job, but if there was a non-symmetrical failure of connections within the tower(s) there would be an imbalance and that would lead to a bias toward one side or another and eventually dump material over one side much more than any other, that would cause incomplete demolition.
Since it wasn't a demolition, your argument is flawed. There was no time for bias: gravity is constant and relentless. The mass grew bigger and faster as the collapse progressed.
"no time for bias" lets look at another case, the crash of the alleged airliner into the side of the tower. The nose of the aircraft would have to penetrate the wall, and the action to do so would take only a matter of milliseconds, however it is alleged to have happened exactly like that tons of aircraft vs tons of structure and moving enough mass in the wall, to make a hole, and doing so in a matter of milliseconds. so given forces to do the job, things move very quickly. If there was enough force to cause the total destruction floor by floor, there was enough energy to react to bias in the action and there would most certainly be bias in the action unless ALL of the joints & connections in any given floor failed simultaneously.
We know they didn't..as observed by the tilt of the collapsing top section... So much for your 'alleged' explaination
and so the tilt of the south tower top section was said to have been caused by gravity as well, and we are told that gravity works straight down, so how did that tilt happen? given the precedent of the Vérinage controlled demoltion, the top section descending upon the lower section could only break up as many stories as it had above, so the action would have had to stop with just a bit less than half the building still standing. and very likely more than that considering that the upper third was built lighter than the third below it.
WRONG!!! Again, your lack of structural engineering is causing you to make faulty claims yet again. This is exactly what FEAs are for. It's not the entire plane's weight versus the entire weight of the building. You need to look at the localized structural area, the materials used, and the connections used. When that plane hit the facade, the facade tries to distribute that impact force through the load paths to the rest of the structure. You have to look at EACH and every element (component and connection) as the force travels outward from the impact point to see if each and every component will resist it's share of the force. It would be tough to fake an FEA because, for example, the strength of materials (steel, aluminum, concrete) have already been established and ANYONE can get that same data. That is why I keep telling you that if the FEAs of the impacts were faked in any way, your truther engineers would be all over it because they can produce the same FEAs and show that it was not possible. I can't believe that you folks don't understand localized failure. Why do you keep thinking that if an object/structure is composed of a stronger material than the impacting object, that object/structure will resist the impact. How about a hand breaking a cinder block? - - - Updated - - - What visual proof do you have of this?
And this is what I have been saying all along, throughout the building, there would be bits that would break before other bits destabilizing the process and dumping mass quantities of rubble over the side of the building and away, thus stopping the action.
so you say ...... however the reality is that with these FEA presentations, there are simplifications, there always are and the way that these simplifications are done tells all. the visual representations of the FEAs that have been shown so far are as much as cartoons. - - - Updated - - - In the case of the "airliners" striking the towers how long did it take for the building to react to the hit and sway?
Yet these "cartoons" are the bane of the truther's existence? Nobody has refuted them in any way, shape, or form. In almost 13 years! What does that say about your group? That they can't refute a simple "cartoon"? Really? All the talented truther engineers you have backing the conspiracy theories and they have nothing? Pretty sad that they can't prove a simple cartoon wrong...
