Finished the concrete floor pad for the shed. The outer concrete foundation is four inches thick, and the inside area is two inches thick. We used chicken wire in the cement to help strengthen it.
The inside floor required 1,440 lbs of concrete mix. I'm not excited about moving bags of concrete in a small fishing boat, but it is possible. It's also possible to use a boat trailer to haul things other than boats, but I would not recommend it.
In preparing to pour the floor, I ran some pipes for possible future usage, such as low voltage wiring, a drain, and water. Pipes are notoriously hard to place once you pour the concrete.