Structural composition: It mainly consists of columns, plates, and beams. The columns are cold-rolled by a continuous punching and rolling mill, and the plates are assembled. The beams and columns are connected by plug-in connections, equipped with self-locking safety pins to ensure safe and reliable connections. Specification and dimensions: The span of unit shelves is generally within 4m, the depth is within 1.5m, the height of high-level warehouse shelves is within 12m, and the height of ultra-high level warehouse shelves is generally within 30m. The floor height is usually adjustable with a pitch of 75mm or 50mm. Load bearing capacity: The load-bearing range of each layer is usually between 500kg and 5000kg, and some customized designs can even exceed 10 tons, which can meet the storage needs of various goods such as heavy industrial parts and bulk commodities. Characteristic advantages: simple structure, easy installation and operation, low cost; The combination can be adjusted arbitrarily, and the inbound and outbound are not limited by the order of items. Goods can be accessed and stored freely; Strong compatibility, suitable for various goods, and can also be transformed into other types of shelves by adding components; Safe appearance, can add accessories such as column foot guards and anti-collision bars. Application areas: Widely used in industries such as electronics, home appliances, clothing, automobiles, supermarkets, etc., suitable for storage modes such as pallet storage and forklift access. Disadvantages: Due to the limited use of supporting forklifts, a large number of forklift passages need to be set up in the site, resulting in relatively low site utilization.