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Only Demolition and Severe Earthquakes Have Leveled Skyscrapers

Skyscrapers are designed to withstand earthquakes and hurricanes.

Outside of demolition, only severe earthquakes have caused "total collapse" of steel frame high-rise buildings.
Those cases are rare.
Those, unlike WTC 1, 2, and 7:

  • Were not skyscrapers, designed to less demanding standards.
  • Left large semi-intact pieces, not just crushed rubble.
  • Did not collapse in a radially-symmetric fashion.

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