12 gauge reinforced steel shelves are adjustable on 3-1/2” centers. Fixed top and bottom shelf adds rigidity and strength to prevent any unwanted movement. Your choice of 1, 2, or 3 adjustable center shelves provide a versatile storage solution. 1500 lbs. capacity per shelf. 2” x 2” x 3/16” corner angles have footpads with anchor holes for securing to the floor. 72” overall height. Boxed angles under bottom shelf and 3-1/2” underclearance.