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Message: [QUOTE="orangecuse, post: 3219112, member: 668"] A cubic foot of steel weight approx. 490 lbs. So, if that box girder is indeed steel, and not a lighter alloy, etc. of such, it would have to be about 204' long to weigh approx. 100,000 lbs. The box girder section at about 20' in length places it at about 10,000 lbs. Without knowing the section's actual dimensions, it's difficult to say for sure, but from the great pics Bees has been taking, :) I'd say they're a lot closer to 20' in length then 204', :) albeit the cube size of the girder box appears greater than 1'. Perhaps it's more like a 2' cube, which would place a 10K lb. section of box girder around 10' in length. That being the case, I'd guess each box girder weights about 10K, not 100K. [/QUOTE]