Reply #63: Yes, Velocity Doesn't Turn Things to Dust & Concrete Won't Break Enough To

[Christophera]

even be turned into uniform pieces unless it contacted uniformly.

A collapse would leave many 20 foot chunks and huge mats of broken concrete still held together with steel. In a collapse, a tower with a concrete core could shear, and part fall off on one side, toppling would occur. Largely intact pieces of the building weighing 1,000's of tons would fall towards adjacent buildings. Huge chunks of concrete shear wall would rend, bend and rip structural steel apart.

Ground zero was sand and gravel, mixed with lots of dust and uniformly distributed structural steel. Massive amounts of very fine dust was propelled upward by thermal energy. That dust, basically silicates was bonded to large amounts of condensed iron in the nearby area.



There is way too much mineral base material in the basement for a steel cored structure. Floor volumes do not add up to one third of the volumes we see. And there were a protportionately small number of floors that had high strength rock aggregate concrete. Most were lightweight concrete with vermiculite, flyash, pumice mixes.