Long span shelf is a common shelf operation, which is the basis of storage and retrieval tools supporting warehouse operation. Long span shelf has great practicability in the field of automobile, clothing and engineering. It is the most suitable shelf solution for large volume but light to medium weight goods. It can be said that the long span shelf system is specially designed to store goods or products in the warehouse and use manual work teams to retrieve them from the shelves. However, such manually loaded shelves are usually used for low-grade goods or products. If it is a high-grade product or material, it can be mechanically guaranteed to enter a higher level warehouse. It is possible to deploy mechanical equipment to lift the operator to the required height, such as a picking forklift or a stacker crane, thus proving that the configuration of long-span racks is easy. Therefore, it can be said that the goal of the long-span shelf system is the height of the warehouse, not the length or width, for storage and picking. Therefore, long-span shelves can be said to be very suitable for various warehouses, storage spaces and other office environments. Long span shelf is a kind of storage and retrieval system, which adapts and develops with the requirements of storage authorities over time.