psikeyhackr
Silver Member
- Jul 18, 2010
- 1,315
- 182
- 98
I think given the time and cash constraints, NIST did a reasonable (though not perfect) job of explaining what happened on 9/11/01.
The NIST has never explained the collapses of the twin towers. The report only says "collapse was inevitable".
http://www.physics911.net/pdf/scott-jones-nist-assumptions-analysis.pdfNISTs official report says global collapse is inevitable following the establishment of the conditions for the initiation of collapse. This is dependent on a 2002 paper proposing a mechanism for progressive collapse of a steel structured building. However the 2002 paper also clearly states that it is based on a hypothesis that the upper section is rigid at the instant of impact with the lower section and makes assumptions of the mass of the upper section, the design load capacity of the lower section and the stiffness of the structure to calculate the overload ratio. Using data in NISTs report and information available online it can be shown that there were major errors in these assumptions and in fact the overload ratio was less than 1 for both the north and south towers. As every explanation of how the supporting structure collapsed relies on this overload ratio then collapse was not inevitable, as NIST state, rather it was unlikely without some extra action or system to remove the supporting structure, or extra mass to overload the supporting structure.
psik