I built one for myslef and another one and sold it.I used heart cypress that I cut and sawed.it is 4' wide 3 1/2' deep x 6'8" high.I made it of 1x12 heart cypress,then I wraped it with 3/4 styrofoam , then covered that with galv. tin.put a 4" smoke stack.I have a fire box that slides in and out through a small door at the bottom.it also has an electric burner with a thermostat,(just in case I have to leave for a while the electric burner will hold it at the right temp.

I have had it for ,goning on the 3rd year now and works great. it will hold 200 lbs or a little over in sasuage.