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 reinforce the shelf legs, especially in setups with few shelves or when joining multiple shelving bays. It ensures the structure remains stable and stands securely, even under heavier loads or in open-shelf configurations. In addition, the support bar can be used to support the goods themselves – either mounted at the rear edge of the shelf to prevent items from sliding backward, or on the side to create a boundary and keep products in place.