The "J2" series frame is made of 2 3/8 inch O.D, schedule 40 pipe and is hot dip Galvanized after fabrication. Center cleat holds top level and the 1 5/16 inch O.D. cross braces stabilize this extra heavy frame. Convenient walk-thru design and welded rigidity can stand up to rough use. Can be purchased with your choice of planking.