I found some incomplete technical drawings online and scaled them in SketchUp. Shipping containers vary greatly with manufaturer and country of origin. This is a representation of one of them. The drawing isn't complete. Some hardware is missing, like hinges and door latches. The roof panel and supports, as well as the supports for the floor are best guesses. I also do not think I achieved the correct width for the forklift channels. I will update drawing as more information becomes available.