Fill EDSAL Premium Shelving to its full load capacity knowing the unit will maintain its rigidity, load after load. Commercial-grade steel shelving features 20-gauge steel with welded tubular box on front and rear shelf edges with lapped and welded corners for greater strength where it needs it most. 14-gauge, common front box post cuts assembly time when connecting two or more units. Posts are punched on 1" centers. Ultra cap shelf clip has a wedge-type grip for quick and easy assembly. Begin with complete, free-standing starter units and use add-ons as needed to complete rows. Made in USA.NOTE: Open-Shelf Add-on consists of 1 front box post, 2 rear angle posts, 1 pair side cross braces, 1 pair back cross braces, shelves and clips. NOTE: Closed-Shelf Add-on consists of 1 front box post 2 rear angle posts, 1 side and 1 back panel, shelves and clips.NOTE: 14-gauge box-formed post cuts assembly time when connecting two or more units. Punched on 1" centers.NOTE: 20-gauge box shelf with lapped and welded corners provides greater strength for maximum load capacity.NOTE: Capacity based on evenly distributed loads with a 1.45 safety factor.