wayne49 said:What is in the sandwich? I see FRP, then plywood, then I am not sure what is in the middle, then plywood, and FRP.
What are the thicknesses of each inside layer?
Thanks. Interesting build.
One 1/2" sheet of marine grade plywood sandwiched between 2 sheets of FRP (with the smooth sides of the FRP facing out). This is close to, similar, to what was used when the original U-Haul box was built by the Morgan Company.