MetroMax i is the most durable, most versatile polymer shelving system and can be optimized for stationary and mobile applications. The individual shelves are comprised of advanced polymers with type 304 stainless steel corners for added strength. Our standard shelves hold up to 1000 lbs. evenly distributed, and our dunnage shelf options hold up to 1200 lbs. A fully assembled MetroMax i stationary shelving unit can hold up to 2000 lbs., evenly distributed.