cantilever is divided into heavy-duty and medium heavy-duty cantilever. The former uses 300*90*3.0 cross-section, while the latter adopts 200*60*2.5 cross section. It takes automatic pre-punched rolled semidetached C-type special profile as the upright, 200 and 140 I-beam as the bottom beam, and special trapezoidal plates as the posted column, which are connected with high-strength bolts. The double inner-folded C-type steel is adopted as the cantilever beam, which is connected with uprights by galvanized pin boards. Upright groups are connected by use of connectors. The loading capacity of single arm is up to more than 1000kg. The designed stability of the overall rack is high. In addition, since the adoption of rolled upright, its design height shall not be limited.     The cantilever rack is applicable to store wires, tubes, profiles, metal hoses and other materials. Otherwise, support bars, metal meshes, steel pallets and steel laminates can be set between cantilevers, lateral forklift or overhead traveling crane can be equipped to enable the rack to be applicable to store any item without interference from uprights in the front face, so as to extend the function