Inspirational stuff right here! Me someday!

I have built a dock and a couple rafts with 55 gallon plastic drums. I learned some things, the hard way. You want to seal the drums in the middle of your temperature difference. For MN sealing the drums at 30 degrees works good. The first dock sections I sealed the drums at warmer temperatures and in the winter they caved in some, so I drilled a small hole in one cap above the waterline, but somehow they still can fill with water. So seal in cooler temps. You can't have too much floatation. My first dock / raft had drums has 12sf per barrel, my last has near solid drums at 6.55sf per barrel. There is no such thing as too many drums.

What's been done with free materials is kind of amazing

This is great, I enjoyed it

Nice project , shout out from Phil's,..

Could these still float if incased in concrete/cement instead of wood?

you do need this.

Great job just the same.

build the deck then frame with metal studs

Just wow😮

Aww your mommy said no :(