The heavy-duty rack is the most commonly used type of warehouse storage shelf, and the load-bearing capacity of each layer is more than 500kg, so the name comes from it. It has good picking efficiency and can store heavy items, but the storage density is low. Heavy shelf is also called pallet shelf, which is the most common shelf form in various domestic storage shelf systems. The fully assembled structure in the form of upright + beam is concise and effective. Functional accessories such as spacer, steel decking (steel grating), metal mesh layer, storage cage guide rail, oil tank rack, etc. can be added according to the characteristics of the storage unit containerized equipment, which can meet the storage of goods in different unit containerized equipment forms. It has the characteristics of large load-bearing, wide height adaptation range, mechanical access and high selection efficiency, but the space utilization rate is general. It is widely used in manufacturing, third-party logistics, distribution centers and other fields. It is not only suitable for variety and small batch goods, but also suitable for small variety and large batch goods. Such shelves are most used in high-level warehouses and super high-level warehouses (such shelves are mostly used in automated three-dimensional warehouses).