Medium duty rack: a)Load capability of each layer is 200-300 kg/layer b)Pitch is 50 mm, beam is adjustable. Medium duty rack/storage rack/warehouse shelves:a)easy assembly and disassembly,and limitless connection.Steel layer plates can be arbitrarily adjusted up and down at 50mm stepsb)parts: vertical columns crossbeams,narrow hanging,wide hanging,layer plates,safety pins,limiting nails and ...