Ok, the garden is bigger then ever, we are growing lots of potatoes (150lbs) and we might be planting more and we don't have any place to store anything. So for now I am going to bury, a couple old chest freezers for storage until I get something bigger built.
Anyway, my question is, the root cellar I am wanting to build is going to be approx 14' wide, 24' long, 4' below ground and 4' above ground. I am going to build a long (ish) ramp that is approx 8' wide so I can back a garden tractor with trailer down there and easily get around with a wheel barrow. I am also going to put in roller conveyors going down into the cellar so I can easily send down boxes of produce. My first plan to build a cellar was to dig the hole, lay a 3 or so foot tall wall out of cement blocks (I already have a ton of blocks) and concrete, then rip in two a 14' wide grain bin that I got free so it is in the shape of a round top shed. I will then place the half of a grain bin on the foundation so the bin will be a couple feet below ground with the top sticking out. Then I would bury the rest of the bin sticking out with a foot or two of dirt. I would use both sides of the bin to make the cellar longer, because I figure if I'm digging the hole and going to this much trouble, I might as well make it a good size.
My concern is, how much weight can the bin hold? I don't want it to collapse when I start putting the dirt on.
My other idea was to make wooden walls and put tin on them. Basically I will just build a wood frame tin building and bury it under ground but I don't know if my tin would rust away to fast? I also thought about putting a tarp (I have tons of tarp from the COOP) between the tin and the dirt to keep it from rusting, but I didn't know if that would help?.
Anyone have any ideas or has anyone built anything like this before?
I'm probably not going to have time to start on this anytime soon, but I would like to start drawing up some plans.
Thanks for any info and sorry for the long post.