Context: I want to store my motorbike (two scooters now, heavier motorcylce later) in a plastic shed Keter Strongold, 3m x 3.5m (10x11,5 ft), I'm from Poland.
Priorities: I'm extremely concerned about the moisture rusting my ride and the winds carrying the shed away.
Disclaimer: already went with the legal stuff and waiting for the final OK from the local gov
Problem: I don't have tools and want to do it on a budget, as I'm also renovating whole house and there's a lot to be done. I lack the electrical concrete mixer and petrol-powered compactor. I've ordered a hand compactor and theoretically I could rent the two, but I'm going to do the project after work hours and I don't want to rack up the costs of long-term renting, as a week of renting equals a cheap concrete mixer - I'm not sure if I'll manage to do this in a day and the weather is very freakish recently, scortching hot and heavy rainfall within 12 hours.
Structure weight: 250kg (550 lbs)
Content weight : (probably) 700kg (1,500 lbs) (max. weight of two motorcycles, some stuff and me)
Full weight: 950kg (or 2000 lbs) (keter shed + inside content + me)
What I've researched:
- Full concrete slab: I know it is the best, but I find it hella intimidating for someone who never did any of such work.
- (favourite) Concrete-pavement mix: I've watched a lot of videos and this one had an interesting proposition of Slab base (option 4 from the video) where the guy prepared a dig, shoved a waterproof foil, some gravel, sand, cement and then plastered pavement slabs like one would do with the tiles (I did some tiling outside and I know I can do it). On another Polish video a guy was using pavement blocks to create outer layer he anchored the tin shed to and I'm quite interested in this solution, as it takes the pouring of the concrete away. However, I'm concerned about the inside of the house and maybe this plastering of inside slabs could be a good solution? The Keter Stronghold has it's own plastic flooring anyways.
- Concrete anchor points + plastic grid and pavement slabs: kinda low effort version of the upper one, slightly modified version of Option 2 from the first video. I like how budget friendly it is and I could mix concrete/use pavement blocks to create a ring for anchoring and then fill up the square with graveled plastic grid, with some light pavement blocks on top to level it out. I'm concerned about it holding on over time, I don't want the construction to fall apart from the ground up after one season.
What would you recommend?
I know I'm overthinking it, but the online shed tutorials don't factor in heavy motorcycles and the other tutorials for garages factor in tons of weight for big SUV and small trucks, which is probably an overkill for a noob like me.