I look forward to a critique of the dust cloud theory described here: http://911research.wtc7.net/wtc/analysis/proofs/volume.html
I also offer my humble opinion that the floors were attacked by force and heat, as if by thermobarics or who knows what. This theory derives from the search in the rubble, as you said, for the floor sections ... and the personal belongings, furniture...
The samples of dust studied by Lioy had "charred woody fragments," cellulose/paper, nano-sized glass fragments, and soot... and the RJ Lee Group samples had 5 percent iron spheres. (If there is a thread for that please direct me. I have read your webpage and given it considerable thought. Fly ash comparisons aside, the amount of welding done before concrete was poured could have contributed some to the multitude of iron spheres. But then there were silicate/glass spheres with iron in them, etc... http://journalof911studies.com/articles/WTCHighTemp.pdf, Mark Basile video)
This style of attack wasn't done just to bring the building down. Like you said it was extreme. The cleanup was kept in mind. It had to be fast in order to decrease the window of opportunity for an investigation to get going. Also the extreme destruction depersonalized the scene so people weren't stopping to look at the office belongings/debris while removing it. (About 60,000 pieces of personal property were found during the 10 months of sifting 1.5 million tons at Fresh Kills, total. Numerous people working at Ground Zero and at Fresh Kills commented on the odd lack of personal property and computers/furniture.)
The New York Times said “those heading the cleanup and those removing the rubble at ground zero are trumpeting nothing short of a construction miracle.... The cleanup, it turns out, will take no more than nine months and cost no more than $750 million.” That was all, after “the authorities. . . [had] estimated the cleanup would take a year and cost $1 billion to $2.5 billion, and they gave contractors blank checks to get the job done.” (Charlie LeDuff and Steven Greenhouse, “Far From Business as Usual: A Quick Job at Ground Zero,” New York Times, Jan. 21, 2002.)
Bringing those floor sections into lower Manhattan was one of the biggest challenges of the construction era. During a tugboat strike there were midnight caravans of flatbed trucks with police escorts who cleared the roads. The guy who organized the truck runs actually helped truck away the debris after 9/11. Tom Petrizzo.
When WTC steel erector Karl Koch “asked him if he'd seen any floor sections,” Tom replied,
“No, that's what I don't understand. […] I didn't see one goddamn floor deck come here with a bar joist in it. They must have disintegrated. Because they did not get here. And I handled this from day fu*kin' one.”
“Did they send you any decking that was loose, no joists?” [Koch] asked.
“None,” Tom said.
“None? Well, that's impossible. There were six thousand of them.”
“There's stuff crumpled up, but go identify it as a floor deck if you can. Impossible. A lot of guys come and ask me, they know I was involved in bringing 'em over, but Karl, not one came where I could say, 'Oh, here's one.' I could not show anybody a floor deck and say, 'This is what I hauled over.'”
I [Karl] couldn't believe it. Not one goddamn floor panel.
- Karl Koch III with Richard Firstman, Men of Steel: The Story of the Family that Built the World Trade Center, Crown Publishers, New York, 2002, p. 375.