... Heavy duty pallet shelf 2.Warehouse rack 3.Warehouse storage rack 4.Provide various shelves racks 5.ISO9001:2000,CE,RoHs heavy duty ... . They are light-duty, medium-duty and heavy-duty racks. 2, heavy duty selective pallet racking-------Light-duty storage Racks (general ... form selective upright frames. 4, heavy duty selective pallet racking-Medium-----Heavy-duty storage racks structure is assembled, so ...