Cantilever shelf is an important kind of shelf. Cantilever racks are suitable for storing long materials, ring materials, plates, pipes and irregular goods. The cantilever can be single-sided or double-sided. The cantilever rack has the characteristics of stable structure, good load capacity, and high space utilization. The cantilever rack columns are mostly H-shaped steel or cold-rolled steel. The cantilever is square pipe, cold-rolled steel or H-shaped steel. Rolled steel or H-shaped steel.