Mercedes Sprinter with Aluminess roof rack and ladder. Beautiful spot by the river in Oregon.
The frame is built up from 25mm/1 inch aluminium tube with a flange along one face. I sourced it from http://www.richardsonsuk.co.uk/25mm-square-tube-system/p47. The flange allows for the infill panels to be either 6mm or 15mm thick and be flush on the outside. - created via http://pinthemall.net