Quote:
Originally Posted by Sebae again
The building was never designed to withstand such latteral force. eg. side impact from a plane. Try building a house out of playing cards and then pull a card out of the side even on the top level and see if it still stands.
|
In fact the building was designed to handle that and more. Here is a quote from JOM (Published monthly by The Minerals, Metals & Materials Society (TMS), JOM is a technical journal devoted to exploring the many aspects of materials science and engineering.)
"The early news reports noted how well the towers withstood the initial impact of the aircraft; however, when one recognizes that the buildings had more than 1,000 times the mass of the aircraft and had been designed to resist steady wind loads of 30 times the weight of the aircraft, this ability to withstand the initial impact is hardly surprising. Furthermore, since there was no significant wind on September 11, the outer perimeter columns were only stressed before the impact to around 1/3 of their 200 MPa design allowable."