I can take some pictures and measurements off of mine with the dump bed if you need it. The floor could be treated thick plywood on metal bracing with the wooden sides even. I also have used the dump bed type plastic sheeting in our feed wagon for a fast clean out like you wouldn't believe. Swoosh ! and it is out.
My internet is going and coming but will check back . collie
My internet is going and coming but will check back . collie