Original Title and Description: Part 18 of Gage Blueprint for Truth Rebuttal (Not Debunked): Freefall Collapse Building 7
Is the freefall collapse of eight stories of one face of the 47-story WTC Building 7 on 9/11 really the silver bullet that proves controlled demolition? This important video explains as simply and directly as possible the complex set of forces that create zero net resistance, which is not the same as zero resistance. The best explanation I know of for Building 7's freefall from a Natural Collapse perspective. Also, here is a video of a very different collapse sequence (not hidden behind its own perimeter wall) that may be of interest: http://www.youtube.com/watch?v=qmiApj...
CLARIFICATION: As I said in this video, my analogy of the bending and breaking stick is not identical to the column buckling that actually occurred in the collapse of Building 7. The initial failure point for a timber column is the identical Euler Buckling which steel columns undergo. I made this clear in the video when I said, "Columns buckled, but in both cases, there is a sudden release and loss of strength." However, a snapping stick and a buckling steel column, while analogous, are not technically identical. The final point of breaking which the lay audience sees as failure with a wooden stick is very different to what happens with a steel column. The steel column does not snap in the catastrophic separation of splinters that the wooden stick undergoes. An assembly of columns bolted or welded may fail at the bolt or weld joints in a manner roughly similar to the snapping of a wooden stick, but most columns in Building 7 actually buckled, losing almost all strength in either case. Bazant et al go further and say, "The high-strength steel has a much lower ductility, which must have caused fractures with a drop of axial force to zero very early during buckling, [...]" Bažant, Zdeněk P.; Le, Jia-Liang; Greening, Frank R.; Benson, David B. (October 2008). What Did and Did Not Cause Collapse of WTC Twin Towers in New York? Journal of Engineering Mechanics 134 (10) p. 896.
CORRECTION: this is a remake of part 18 after mistakes in the first version were caught by a 9/11 Truth researcher.