Reply #34: Yes, Volumes Best, Then Convert, BUT, Is 425k cu yd Figure Above Ground Or

[Christophera]

a total for both towers and the basement, or just the towers?

I calculate 210,000 cubic yard above ground including the inner core walls every other floor. Twice that is very close to the 425k figure. Meaning that the statement may be actually "425,000 cubic yards in the towers". Then, .......... as it got handed down it changed to "425, 000 cubic yards in the WTC".

According to my site plans there were 5 floors of solid concrete at the center below the tower, outside its footprint which was acres.