As part of a shop addition this summer I want to build a tunnel that connects two buildings (yet to be built) that are 70 feet apart. There's a lot to consider. I have a large stockpile of 3" pandeck so I can form the walls conventionally and pour the pandeck in as the ceiling. If I use pandeck the tunnel would only be about 5 feet wide. However, doing the math on form materials to build the wall forms has me spending about what a couple nice 40 ft conexs would cost me delivered. Using containers would add about 20% to the concrete cost, but that's not a big deal.
What kind of internal wood bracing would I need in a shipping container to keep the walls from buckling from the pressure of 8" of concrete on the sides and 12" on the roof?
What kind of internal wood bracing would I need in a shipping container to keep the walls from buckling from the pressure of 8" of concrete on the sides and 12" on the roof?