The large-tonnage special-shaped member refers to a steel member with a special shape, which has a large span, an irregular shape and an asymmetric edge. Large tonnage shaped components are generally used in the construction of large-span construction projects, large tonnage shaped components are widely used in large industrial plants, warehouses, hospitals, office buildings, high-rise buildings, cold storage, multi-storey parking yards, Bridges and other construction industries. This kind of large-tonnage special-shaped steel structure member has high strength, light weight, good seismic resistance, strong deformation ability, good thermal insulation performance, energy saving efficiency of 50%, and the overall rigidity is relatively good, especially suitable for using this large-tonnage steel member; The material homogeneity and isotropy are good, under the same load conditions, the weight of steel members is an ideal elastic body, which conforms to the basic assumptions of general engineering mechanics; Less material can have greater deformation, light weight, good toughness can withstand the dynamic load well; And the construction speed is fast, the construction period is short, the large tonnage shaped component has a high degree of industrialization, can carry out a high degree of mechanization, professional production, save labor costs, and provide construction efficiency.

 Large-tonnage special-shaped components refer to steel components with large weight and irregular shape, often used in construction, Bridges, ships, machinery and other fields, with the following characteristics:

 1, high strength: The steel strength of large tonnage special-shaped steel structure members is higher, can withstand large loads, and good structural stability.

 2, diverse shapes: large tonnage special-shaped steel structure members can be made into various shapes according to needs, such as beams, columns, trusses, etc., can adapt to different building, bridge and other engineering needs.

 3, convenient welding processing: The production of large tonnage special-shaped steel structure components requires steel cutting, bending, welding and other processing technology, but because of the high strength of steel, stiffness, so the need to use special cutting, processing equipment, but overall, the processing of such structures is relatively easy.

 4, high reliability: large tonnage special-shaped steel structure members are made of high-strength steel, can withstand large loads and vibrations, has high reliability and safety.

 5, good durability: the surface of large tonnage special-shaped steel structure members can be anti-rust treatment, not easy to rust, long life.

 Large tonnage special-shaped steel structure members are widely used in construction, Bridges, ships, machinery and other fields. For example, in the field of construction, large-tonnage special-shaped steel structure components can be used for the main structure of high-rise buildings and the truss structure of industrial plants. In the field of Bridges, large tonnage special-shaped steel structural members can be used for the main beams of long-span Bridges and arch bones of arch Bridges. In the field of shipbuilding, large tonnage special-shaped steel structural components can be used in shipbuilding decks, bulkheads, hulls, etc. In the field of machinery, large tonnage special-shaped steel structural components can be used to make structural components of large machinery.