1. According to the height design requirement, the high-rise steel structure adopts frame, frame support, tube mega-frame structure respectively. The steel member has good light ductility can be used in welded rolled section steel, which is suitable for super high-rise building, the steel reinforced concrete member has high rigidity good fire resistance, which is suitable for middle high-rise building bottom structure Concrete-filled steel tube construction is simple, only used for column structure.

2. Space Steel structure technology space steel structure light weight, stiffness, beautiful shape, construction speed. In our country, the space steel structure with large amount of Z is composed of spherical joint flat space truss, multi-layer variable cross-section space truss reticulated shell. It has the advantages of large space stiffness low steel consumption, can provide complete CAD in design, construction inspection procedures. In addition to space truss structure, there are long-span suspension structure, cable-membrane structure so on.

3. The light steel structure technology is accompanied by the new structure form which is made of the wall the roof protective structure by the light colored steel plate. Light-gauge steel structure consisting of large-section thin-walled h-section steel wall beams roof purlins welded rolled more than 5 mm steel plates, circular steel flexible support systems high-strength bolted connections, with column spacing ranging 6 m to 9 m, the span can reach 30m more, the height can reach more than ten meters, can be set light hanging four. The amount of steel used is 20-30kg/m ~ 2. There are now standardized design procedures professional production enterprises, good product quality, fast installation, light weight, less investment, construction is limited by the season, suitable for a variety of light industrial plant.

Four. The technology of steel-concrete composite structure, which is composed of steel section steel management concrete member, is widely used in recent years. The composite structure has the advantages of both steel concrete. It has high overall strength, good rigidity good seismic performance. When it is constructed by enclosing concrete, it has better fire corrosion resistance. The steel consumption can be reduced by 15-20% for composite structural members. Composite floor concrete-filled steel tube members, but also has less formwork no formwork, convenient rapid construction of the advantages of the greater promotion potential. It is suitable for the frame beam, column floor of multi-story high-rise building, industrial building column floor etc. .

5. High-strength bolt connection welding technology high-strength bolts are composed of bolts, nuts washers, which transmit stress by friction. The advantages of high strength bolt connection, such as simple construction, flexible removal, high bearing capacity, good fatigue resistance, self-locking property high safety, have replaced riveting partial welding in the project, become the main connection means in the steel structure manufacture the installment. For the steel members made in the workshop, the thick plate should be welded by automatic multi-wire submerged arc welding, the box-shaped column diaphragm should be welded by melting nozzle electroslag welding, etc. . Semi-automatic welding technology Gas metal arc welding flux-cored wire self-shielded flux-cored wire technology should be adopted in site installation construction.

6. Steel structure protection technology steel structure protection includes fire protection, anti-corrosion, anti-rust, generally used in the fire paint after no need to do anti-rust treatment, but in the construction of corrosive gases need to do anti-corrosion treatment. There are many kinds of domestic fire-retardant coatings, such as TN series, MC-10, etc. . Among them, MC-10 fire-retardant coatings include alkyd enamel paint, chlorinated rubber paint, fluorine rubber paint chlorosulfonated paint, etc. . In the construction should be based on the steel structure type, fire grade requirements environmental requirements to the appropriate coating coating thickness.