CurvedSpace Forums: Loose Change - CurvedSpace Forums

Do you see how far in that plane went? More than halfway. There is no way that a building could survive after being cut in half at the base.

criticisms of the WTC design feature six main points:

  1. Longspan floors supported by external columns are inherently weaker than the traditional box frame column/girder arrangement with internal walls.
  2. The bunching of all internal columns in a relatively narrow center shaft in a building is an "all your eggs in one basket" configuration-- if that region on any floor below the top floor is catastrophically damaged, the entire building is doomed. This stands in stark contrast to earlier generations of skyscrapers which utilize full skeletons of stepped columns, usually one row approximately every 25 feet (7.6 m) from the center to the perimeter.
  3. The World Trade Center exclusively used lightweight materials, especially in the facade. Had the WTC facade contained even minimal masonry elements and/or traditional heavy steel outermost column rows, it is less likely the aircraft would have cleanly penetrated to the core of each tower— a significant portion of debris and jet fuel would have remained outside, a much different scenario.
  4. Single-bolt connections binding the longspan floorplates with the load-bearing external columns were extremely lightweight for their assigned task. One study group from the Massachusetts Institute of Technology has concluded the proximal cause of the south tower collapse was failure of these bolts in the southeast corner of the building. Double-bolts should have been used.
  5. The use of gypsum cladding instead of reinforced concrete to shield stairwells. Almost all skyscrapers, including those built since the WTC, shield stairwells in reinforced concrete. On September 11th, it was the collapse of all stairways above the impact level that consigned all people above the impact zone in Tower One to death. Tower Two had two of its three stairwells taken out above the impact area by the plane. Some people above the impact zone survived, as they used the third stairwell. Computer models have shown that most of the stairwells in both towers would likely have remained usable until the general collapse had they been shielded in concrete.
  6. According to the National Commission on Terrorist Attacks on the United States, each tower's core consisted only of a hollow steel shaft.

I'm too tired to argue, but its never happened before, referring to a plane taking down a building, so why should it happen twice in one day? Especially in buildings built so well, that they are equipped to withstand any catastrophe, including a plane crashing into it?

The government's calculations put the speed of the first plane at 494 mph, and the second at 586 mph. The MIT analysis determined the first plane was traveling 429 mph, and the second 537 mph, The Times said.

but its never happened before, referring to a plane taking down a building, so why should it happen twice in one day?

Pwnt.

Wonder how many times Tick's gonna get pwnt.





Four so far.