Got started on the frame for the camper today. I started by making a a rectangle frame out of 1 1/2" square tubing. To that I added 1 1/2 X 2", 1/4" angle iron for cross bracing. With the 1/4" I will later be able to drill and tap to attach the flooring. The frame should go in the 250-300# range when complete. The angle pieces where used to keep it square while welding. It should end up even with the rear of the bed but hang over on the sides just a touch. More floor supports will go on, ran out of steel.
Rob