Heavy steel structure generally refers to steel members with H-section steel column plate, of which the thickness is at least 25mm.

Roof and enclosure structures, based on materials, include: Al-Mg alloy plate, titanium-zinc plate, copper plate, aluminum plate, color steel plate, composite board and stainless steel plate.

Special-shaped steel structure, also known as spatial arbitrary steel structure, is generally applied to shopping mall, complex building, hotel, gymnasium, urban sculpture, gatehouse, toll station, building roof, large steel stairs and others.

Special-shaped steel structural engineering usually adopts profiled steel structure, grid structure, membrane structure, pipe truss, etc.; the enclosure structure surface layer is generally made by aluminum plate, aluminum-plastic plate and stainless steel plates. 

  Integrating the function of power generation, sound insulation, heat insulation and decoration, photoelectric curtain wall is a new functional curtain wall which combines the photoelectric techno-logy and curtain wall technology. It represents a new direction of the development of curtain wall technology. With the solar photo-voltaic cells and semiconductor material, the photoelectric curtain wall collects, converts, accumulates and voltage-transforms the natural light and finally links to the architectural power supply 

   It is glass curtain wall made by glass rib and glass panel, which includes hanging type, lower-end supported type and hidden cable glass rib type glass curtain wall.

        Frame-supported curtain wall is also an enclosure system that has been widely used. Zhognhong curtain wall has the most sophisticated technology of the time and construction capability . In terms of frame-supported curtain wall, its column, beam and panel are installed in situ in turn. Among them, the panel material can be pre- processed as units in the factory and then fixed on the frame made by column and the beam. The bearing load of panel unit will be transmitted to major structure through the column (or beam). 

     As the development trend of curtain wall, unitized curtain wall is one of the most mainstream high-grade external enclosure system for buildings, which is characterized by standard design, industrial and programmed production and processing, mechanical field installation and informatization of the whole process. 

     It refers to curtain wall made up of glass panel, point-supporting device and supporting structure, which is divided into steel truss type, glass rib type, pull rod, cable stayed, self-balancing truss type and single rope of point supported curtain wall