I will be constructing a barge, so I can move my Kioti CK27 back and forth from Cottage lot when I want rather than wait for the lake to ice over.
Has anyone built one yet? Tractor weights 5000Lbs, how overbuilt should it be, 10,000 Lbs?
A bit late for this perhaps.......but I would suggest you look into building your barge hull from ferro-cement. Basically it's portland cement, sand and wire mesh/expanded metal. Chicken wire works as well.
You build your design with the wire /metal. Reinforce it however you wish. And then trowel the cement mortar into it. The nice thing about it, is no welding. It's fireproof - even with the styrofoam inside. And from what I've read - it doesn't need to be water sealed, but it probably wouldn't hurt it if you did.
And following up on the styrofoam idea...yacht and houseboat hulls have been made with blocks of styrofoam encased in ferro-cement.
The military built WARSHIPS out of ferro-cement in WW1. And my dad said he'd worked [army] aboard a barge made of it [ used by the motor pool],...jeeps, trucks, whatever. Plenty of weight on it. They kept it moored to the dock. Dad said it was fairly stable - didn't rock much.
I believe you'll still need a sacrificial anode.
somewhere on internet I came article about how 3rd world countries like using the stuff because cheaper than full metal hull. Plus it doesn't take any skill to build a really big floating concrete shoebox.
A lot of colleges have annual competitions for student built ferro-cement. canoes.