Heavy 14-gauge galvanized steel shelves each carry a total safe allowable uniform load of 1,000 lbs. when evenly distributed over the length and width of the shelf. Guard Master(tm) Heavy-Duty, Heavy-Load cabinets are rated at up to 5,000 lb. based on loading four shelves and the cabinet bottom. These load ratings are tested in accordance with AISI. Galvanized shelves offer superior scratch, corrosion, oil and chemical resistance and adjust on 2" centers. Welded shelf hangers allow shelves to be bolted in place.