4x4 legs 10 of them spaced out evenly. build a top and bottom frame with 2x6s standing upright not lying flat. with heavy nails put the 4x4s in side each corner once they are in take another piece of 2x6 and sandwich the 4x4 leg do this with each set of legs then take some 2x4 and run them longways to prevent anyside to side movement. I'm gonna try to post some pics.