Bugeye,
If my post was greek, let me know which part, I'll try to english it up a bit. Sometimes I get a too much jargon going.
Brissance is the shattering effect. High brissance for a sharp jolt to crush or shadder the shock waves is very fast. Low bissance for a deep boom so to speak, longer shock wave.
TNT equivalency is how much of a certain type of explosive is equal to an equal weight of TNT.
TM7,
I haven't seen any of the residue from WTC7 or any actual data. I have seen alot of explosions and fires though. Don't get to wrapped up in those burn rates, overpressures and plasma jets from an explosion can tell you more. Over pressure is a funny thing, it can cause all kinds of wierd things to happen.
Department of Transportation helps set the classifiaction of explosive and hazardous materials.
Some things becuase it is transported in bulk on open raodways. Under the right conditions somethings are hazardous.
Would you believe flour used for cooking has alot of explosive potential? Yet it is used safely daily for many years.
As far as WT7, How much is steel and how much is very consumable materials, as in carpet a petroleum product that once it gets burning it does so very well. If the builder short changed the steel content or made substandard substitutions you could be looking at something different all together.