My sister in-law bought a plastic shed at Costco (Keter Bellevue) with floor dimensions of 100.5" x 80.5". ("
I thought this was a pretty bad idea for a plastic floor shed, and that it will be difficult to get all those blocks arranged into a level, even, platform. I would have built a base out of pressure treated plywood sitting on a frame of 2"x6" pressure treated studs, and set that on level ground without using any gravel or sand.
But now that she's bought all that material, is practical to sit it on blocks, placed in gravel, even if it weren't an optimal arrangement? I also thought of putting pressure treated plywood on top of the concrete blocks and screwing the plywood to the bocks, but that's a lot of screwing.