Support bar for tubular shelving – reinforcement and securing of the shelving structure. The support bar in a tubular shelving unit is used to stabilize and reinforce the shelf legs, especially in setups with few shelves or when combining multiple shelf bays. It ensures the structure remains stable and stands securely, even under heavier loads or in open-shelf configurations. Additionally, the support bar can be used as a product retainer – either mounted at the back of the shelf to prevent items from slipping out behind, or at the side to create a boundary and keep products in place.