Here is what I am doing (obviously not done). Not really planning on hauling anything but I am sure it can hold a set of wheels without a problem. I'm not racing (raising the floor for clearance). Its mostly 1x2x.083 with a few pieces of 1x1x.095. The pieces bolted to the bedsides are .120 wall because thats what I had when I started. I am going to get rid of the stock floor once it is all built. I would go with the .083 if I did it again. I can weigh it after its built if you want.
