US Patent 11160369 Shelving system

A shelf system (1) comprises: a frame (5) for forming at least one shelf (70), and a plurality of primary and secondary rails (40, 50). The frame comprises a plurality of mounting portions (20, 30), to each of which at least one of a primary rail (40) and a secondary rail (50) is removably mountable to form lanes of different widths. Each lane includes a primary rail on one side and a secondary rail on the other side for supporting and guiding at least one item (60) in the lane, and the primary rails each comprise at least one sensor (700) for sensing the item (60) in the lane.