This was our first build. We started with a 16" pipe, split it and added 5" to get the shape we wanted. The firebox is also 16" pipe with 4" removed on top so it would be flat. We also added 5" to the end (square) for looks. The wheels are 12" pipe cut 2 1/2" wide and 5/8" rod for spokes. The work table at the end is removable to allow the handles to be used when moving. The boards in frome come off as well for cleaning. It holde Temp. really well and smokes great. It is (smoke chamber) 42" long. We have two pull out racks. We also made the tools.