Because of the warehouse area and cost, small and medium-sized warehouses use shelves with relatively fine shelves, targeted use of storage shelves, simple devices, and adjustments from scratch. Medium-sized longspan shelves, heavy-duty racks, and mezzanine floors are all common types of shelves for small and medium-sized warehouses.
 
The medium-sized longspan shelves are beautiful in appearance, wide in area contrast, and split between the direct shelf structures. The medium-sized longspan shelves are distinguished according to the heavy-duty components of each floor. They can be divided into medium-A-shelves, medium-B-type shelves, and medium-C-type shelves. The heavy load of each layer is about 200-800kg. Small and medium-sized companies' warehouses have excellent adaptability to light industrial goods, civilian goods, and bulk commodities. The trapezoidal hole type, the butterfly hole type, and the rhombic hole type columns are the most used column hole types, and the prices of the three hole types are different, but the bearing effect is uniform.

Heavy-duty racks are one of the more common types of storage racks in small and medium-sized warehouses. The production of heavy-duty racks is the scope of storage for heavy-duty racks in production and manufacturing companies, industrial processing companies, and standard-sized goods. Similar to medium-sized longspan shelves, heavy-duty racks perform well in terms of storage area, sensitivity of shelf use, and adaptability of the storage environment. In the small and medium-sized warehouses, the heavy-duty racks can occupy the warehouse space of each block reasonably, according to the actual situation. Each group of shelves can directly perform better functions through the combination of the main and auxiliary frames. Heavy-duty racks, goods are stored through the tray as a carrier, and the number of placement of each storage rack unit can be designed. The use of mezzanine floors or attic channels in small and medium-sized warehouses can more comprehensively use the limited area of ​​the warehouse to supply the same storage equipment for various goods. The structure of the mezzanine floor can be placed directly on the channel, as well as on racks that are placed on the delivery and channel.

Mezzanine floors are generally constructed with 2-3 layers, which can be used to build storage rack channels by taking advantage of the terrain and orientation of the warehouse, and can potentially use more limited storage space. The mezzanine floor is suitable for a wide variety of large-volume or multi-small-sized goods, and the goods are manually accessed. The goods are generally sent to the second and third floors by forklifts, hydraulic lifts, or freight elevators, and then sent to a certain location by a light trolley or a hydraulic pallet truck. Orientation. Applicable to the situation that the warehouse is high, the goods are small, manual access is required, and the storage volume is large.