Nesting Z Racks Heavy Duty Nesting Aluminum Sheet Pan Racks Amazon.com: Only Hangers Commercial Grade Rolling Z Rack with Nesting Nesting Z Racks Heavy Duty Nesting Aluminum Sheet Pan Racks heavy duty z racks. Our heavy duty "Z" Racks can be nested together for saving space. The casters on this model come with brakes and are non marring. These racks are built to withstand heavy loads and are designed for commercial use but will work in the home as well when a strong, well built rolling rack is desired. Introducing the newest addition to our lineup of exceptional storage solutions the Heavy Duty Nesting "Z" Rack! This rack is specially designed with sturdy materials and a sleek chrome finish that not only adds a touch of style to any space, but also ensures maximum durability. With a weight capacity of 400lbs, this rack is perfect for use in stores, trade shows, or even in your own home.