What are the structural forms of steel space frames?

 Steel space frame is a special type of steel structure, usually used to support large-span roofs or to construct special shaped buildings. It can be used in a variety of structural forms, the following are the common ones:

 

space frame

• Rigid Frame Structure: Rigid frame structure is a rigid frame composed of steel rods, nodes and connectors, which can withstand vertical loads and horizontal loads. Rigid frame structures are often used for large-span buildings, such as gymnasiums and exhibition halls.
• Arch structure: Arch structure is a graceful curved form, often used in large-span buildings, especially spherical or domed gymnasiums and exhibition halls. Arch structure can withstand the pressure and spread the load to the fulcrum.
• Dome structure: Dome structure is a special form of arch structure, usually used in domed buildings, such as planetariums, domed stadiums, etc.
• Grid Shell Structure: Grid Shell Structure is a grid-like structure composed of many interconnected thin-walled bars, usually used to create large-span roofs with curved shapes, such as gymnasiums, exhibition halls and so on.
• space frame structure: Grid structure consists of intersecting rods that can form a planar or spatial space frame, usually used for large-span buildings. 
• Truss structure: Truss structure is a triangular structure composed of rods and nodes, which can effectively bear loads and keep stability, and is commonly used in bridges and large-span roofs.
• Space Rigid Frame Structure: Space Rigid Frame Structure is a three-dimensional structure composed of many interconnected rigid frames, which can be used to support large-span buildings, such as gymnasiums, airport terminals and so on.
• Double-storey space structure: double-storey space structure is a complex structural form, commonly used in buildings requiring multi-storey space layout, such as gymnasiums, exhibition halls and so on.

These structural forms can be used individually or in combination in a building project to meet different design needs and functional requirements. The choice of the appropriate structural form depends on the specific use of the building, the environmental conditions and the creativity and technical ability of the designer.