BOLTLESS WIDE SPAN STORAGE RACK WITHOUT DECKING PROVIDES EXTRA SPACE FOR BULKY MATERIALS. BOLTLESS ASSEMBLY WITH SNAP TOGETHER COMPONENTS REQUIRES NO NUTS, BOLTS, CLIPS OR TOOLS. UPRIGHTS ARE A SUBSTANTIAL 1-1/2″ X 2-1/4″ X 14 GAUGE STEEL. UNIT INCLUDES 3 LEVELS, ADJUSTABLE AT 1-1/2″ INCREMENTS. HEAVY-DUTY ROLL-FORMED STEEL FRAMING WITH CHIP RESISTANT GRAY BAKED ENAMEL FINISH. ALL MODELS HAVE DOUBLE RIVETED BEAMS FOR MAXIMUM FRAME RIGIDITY. SUPPLY YOUR OWN DECKING. THIS 72″W MODEL WITH 900 LB. CAPACITY INCLUDES 1 CENTER DECK SUPPORT PER SHELF.