I am a colloge student studying engineering and would like some information on the way that the WTC towers were built and what stresses were inflicted upon them when the planes hit. With a few minutes research i have come across the information that the WTC buildings were engineered to withstand the collision of a 747 jetliner. Any info inculding bluprints or information on this would be greatly appreciated. Thanks.

• ID# 205.2 (reply to #205.1) - 15 September 2001
  AFAIK, the towers have not been expressly designed to withstand such an impact that a 747 (a plane notably larger than the 767) hit would cause. Nevertheless, the fact that it was the the fires that ultimately caused the collapse is a testament to the structural soundness of the design. ED