Strong Hold Heavy Duty Metal Shelving is the most rugged Industrial Shelving on the market. Boasting a capacity of 200 lbs. per square foot, this steel shelving unit will hold just about anything you need it to. The uprights are 12 gauge punched steel adjustable on 1" centers. Side and back braces provide stability to these units. The shelving units are shipped knocked down with hardware and assembly instructions. The units can be combined as starters and adders for additional length.