Reply #142: But the acceleration was not nearly 9.81 m/s^2. It was significantly less. [View All]

[Carefulplease]

And it has been measured to be significantly less than g. How do you explain this if the supporting structure was blown out in advance of the falling mass from above crushing it?

See Figure 1 at the end of this paper.

http://www.911myths.com/WTCREPORT.pdf

The author also demonstrates that the yield strain capacity of the structure supporting the floors below is very small as compared with the kinetic energy of the falling mass above. There would really be no need for additional explosives once the support columns failed at the level of the damaged floors. (Granting for the sake of argument that damage and fire alone wouldn't have initiated the failure.)