Here is a patio roll-around couch that can be built with only a few hand tools, The original is of 3/4" (net) knotty pine, assembled with galvanized screws, dowels, and casein glue, and finished with linseed oil. The side members of the bed frame are screwed from the inside to the uprights for the back, and the cross members of the back are doweled to the uprights and glued to three-cornered cleats, The wheels turn on lag screws with heads countersunk and covered with disks of waterproof plywood, An allwood axle could be used, if preferred, with a dowel through each end to keep on the wheels. 
The wheel turn on lag screws with the heads countersunk and covered with plywood disks.
