In a message dated 2/18/07 1:05:31 P.M. Central Standard Time, [EMAIL PROTECTED] writes:
Any meditating structural engineers out there who can offer a view on the probability of the twin towers collapsing in the freefall hollywodesquelly neat way they did simply by crashing two airplanes into them? I'm not a structural engineer but on 60 minutes they did a program , I believe before 911, stating how dangerous high rise buildings could be because of the collapsing pancake effect like we saw in the twin towers. It was a structural problem that had to be overcome to prevent such a collapse under *normal* conditions. They showed video of high rise building being built that collapsed without anything such as an explosion or aircraft hitting them. Now add an aircraft hitting a building at several hundred miles per hour, intense heat that softens the steel structure and rivets that hold it together and the impact of one floor falling on top of another and there you have it. OBL is an engineer and new of this problem with high rise buildings.
