Beats me how that one keeps getting repeated, it's the easiest one to disprove. Watch the videos of the towers coming down, you can see fragments coming off the towers and falling faster than the main buildings did. They didn't come down at free fall speed, and it's perfectly obvious.
With the floors detached from the central core what brought the core down? How high was the steel that can be observed as still standing at the 3:00 mark? With the rest of the building already below this part should it not be on top of the pile? What is the problem with the explanation (for the time-line) given on this well visited site? How far off free-fall speed is WTC7?
The need to believe in the conspiracy comes from the same human need as religion. People have to believe that there is a reason they can grasp for bad things that happen. No rain this summer? It's because you didn't sacrifice a goat at the spring equinox. WTC hit by planes? It's not because of some terrorist, it's an inside job by our own gov't.
It's the same human need.
LOL When you are digging into some subject/issue it is investigative work, all the ones who have spent time investigation the minute details of the 3 buildings coming down are just crack-pots. Your arrogance seems to have reached new levels Dex.
The theory goes that the floors started to pancake, if that is the argument then what brought down that center core???
The twin towers were unusual in that the outer cladding of the building actually carried a large part of the load for the structure. Each floor was suspended from the external walls, rather than the other way around, which is common in most skyscrapers where internal pillars provide the strength, and the walls merely keep the wind out. While intended to provide strength while maximizing rentable office space, this actually proved to be a lifesaving innovation.
Controled Demolition is dome by collapse from the bottom up.
The WTC collapsed from the top down.
Perhaps you should read this about the architecture of the WTC towers:
The World Trade Center : World Trade Center, New York :: Glass Steel and Stone (external - login to view)
Perhaps I did read that and maybe even more. "Each floor was extended from the outer wall" to the 'inner core', your explanation does not specify where those spans 'began and ended', once loose from the core why would the core collapse?"
911 Links - WTC Core Construction (external - login to view)
Under the picture with the yellow high-lights & numbers there seems to be a hole where the strongest part of the building should be. (BIG HINT)
911 Links - WTC Core Construction
In the first picture in the above link which looks stronger? the thin outer shell or the massive girders that define the stairways and elevators and such??
Careful who you throw labels at. I remember that video. Kakato was on (I believe) Ranters Roost under a different name when he made it. It was classic.
The diagram with the yellow bits appears to be a bit different than the picture that says "actual core".
[url="http://wtc7lies.googlepages.com/wtccoreconstruction"]The "massive girders" were not massive. "This produced distortions in the slender structural steel, which resulted in buckling failures." -
Why Did the World Trade Center Collapse? Science, Engineering, and Speculation (external - login to view)
Really, even one of you links says the core was the supporting structure.
" Inside this outer tube there was a 27 m × 40 m core, which was designed to support the weight of the tower."
Not massive compared to what? Here are their actual dimensions.
"The core of WTC 1 was designed to support the entire weight of the buildings several times over. Far more than a mere "service core", it comprised of 47 steel box columns tied together at each floor by steel plates, similar to the 52" deep spandrel plates that tied the perimeter columns together. The largest of these core columns were 18"x36", with steel walls 4" thick near the base and tapering in thickness toward the top, and was anchored directly to the bedrock."
Kerosene fires would not weaken a structure that is 'boxed' every 12 ft
Given the thermal expansion of steel, a 150°C temperature difference from one location to another will produce yield-level residual stresses
A basic engineering assessment of the design of the World Trade Center dispels many of the myths about its collapse. First, the perimeter tube design of the towers protected them from failing upon impact. The outer columns were engineered to stiffen the towers in heavy wind, and they protected the inner core, which held the gravity load. Removal of some of the outer columns alone could not bring the building down. Furthermore, because of the stiffness of the perimeter design, it was impossible for the aircraft impact to topple the building.
Thermodynamically, the heat contained in a material is related to the temperature through the heat capacity and the density (or mass). Temperature is defined as an intensive property, meaning that it does not vary with the quantity of material, while the heat is an extensive property, which does vary with the amount of material.
Really? Even a wood fire will weaken a steel beam to the point where it collapses under load.