... is150-300kg/layer 2.Treated by ball-blasting boltless rack 3.Q235 cold-rolled steel 4.Shelving rack Description ... Medium-Duty Racks belongs to one of the warehouse shelves, clapboards Racks, which are differenced and named by ... called ladder beam, which height matches the steel plate.3. Steel plates are the cold-rolled steel plates, ... distributed "Ten-years Quality Assurance" Medium-duty Shelves and Racks