Just to add more gory details to my new hobby.

The NIST reports consist of 54 PDF files containing 11,305 PDF pages.

The word steel is mentioned 6,047 times.

The word concrete is mentioned 2,232 times

The words ton and tons are mentioned 136 times.

http://www.yourbbsucks.com/forum/sho...44&postcount=8

I have read every sentence containing any mention of tons. One plane contained 5 tons of cargo and the other had 9 tons. They talk about how many tons of steel came from what companies. They talk about how many tons of steel were delivered to the building on a monthly basis during constrction. They mention 200,000 tons of steel used in both towers 8 times though mostly this is in reference to the miniscule number of samples they have in relation to the amount of steel. They talk about 60 tons of live load per floor in the building. They talk about New York and Chicago building codes for ground settlement per ton. They do not talk about how many tons of concrete were in the buildings.

I have found no discussion of the distribution of mass within the building in terms of more steel being toward the bottom. So I still have no idea how much steel and concrete were on the floors where the planes struck.

psikeyhackr