Support bar for tube shelving – reinforcement and securing of the shelving structure. The support bar in a tube shelving system is used to stabilize and strengthen the shelf legs, especially in configurations with few shelves or when assembling multiple bays. It ensures the structure remains stable and stands securely, even under heavier loads or in open shelving arrangements. In addition, the support bar can be used as a restraint for the goods themselves – either mounted at the rear of the shelf to prevent items from sliding backward, or at the side to create a boundary and keep products in place.