Prior to moving the shipping container, I prepped and poured two of the foundation bases. I wanted the container blocks to rest on a flat even surface that distributed the load evenly to the ground and avoid cracking down the road. I dug two holes centered at where the corners of the container would be. The holes were two feet square by about ten inches deep.
Once the holes were in place, I built a frame to mold the top of the concrete foundation base. I pounded 5 two-foot 3/8" rebar into each hole and filled the bottom of the hole with a few inches of limestone gravel. I used three 80lb bags of Maximizer concrete for each foundation base.
The weather didn't cooperate the first day I poured concrete so I had to cover it up and finish another day. I didn't do anything special to make sure that these were level with each other. I basically eye-balled it and it worked out perfectly. I'm not saying it is the best method but at least I saved myself some trouble given the ultimate goal was for a flat surface and I planned to shim the container if necessary.
Next we prepped and poured the foundation bases for the other side of the container. We had to do this from under the container so it worked out well that I had it a foot off the ground. We supported the container about 4 feet in until the bases were set about a week later and then we jacked the container and moved them to the corners.
After moving the container over the foundation bases, we used the 12-ton bottle jack to put the container up on blocks. I used three 14" x 14" x 4" concrete blocks for each corner, raising the container 1 foot off the ground. I then filled the hole for the jack with concrete and placed one of these blocks on top to form a permanent jack base. We had issues throughout this process with wet days that limited when we could jack up the container. This won't be a problem in the future. Here are some pictures of the container leveled.
The container is finally moved and level and ready for windows and doors! Many thanks to our new friend Jonathan Molina who came out and helped us level the container and pour the remaining foundation bases.
My name is Ashley. I want to minimize my footprint and live a more sustainable lifestyle. I'm an engineer with a love for simplistic industrial design and fabrication.