Mengshan Yishui Grand Stage

　　Steel structures are structures made of steel materials, and they are one of the main types of building structures. The structures are mainly composed of components such as steel beams, steel columns, and steel trusses made of steel sections and steel plates, and rust prevention processes such as silanization, pure manganese phosphating, water washing and drying, and galvanizing are used. The various components or parts are usually connected using welds, bolts, or rivets. Because of their relatively light weight and simple construction, they are widely used in large factories, stadiums, super-high-rise buildings, and other fields. Steel structures are susceptible to rust; generally, steel structures require rust removal, galvanizing, or coating, and require regular maintenance.
　　1. High material strength, light weight
　　Steel has high strength and high elastic modulus. Compared with concrete and wood, its ratio of density to yield strength is relatively low. Therefore, under the same stress conditions, the steel structure components have small cross-sections and light weight, making them easy to transport and install, suitable for structures with large spans, high heights, and heavy loads.
　　2. Steel has good toughness and ductility, uniform material, and high structural reliability
　　Suitable for withstanding impact and dynamic loads, it has good seismic performance. The internal structure of steel is uniform and close to an isotropic homogeneous body. The actual working performance of steel structures conforms to the calculation theory. Therefore, steel structures have high reliability.
　　3. Steel structures have a high degree of mechanization in manufacturing and installation
　　Steel structure components are easy to manufacture in factories and assemble on-site. Factory mechanized manufacturing of steel structure components has high precision and high production efficiency, and on-site assembly is fast and has a short construction period. Steel structure is a type of structure with a high degree of industrialization.
　　4. Steel structures have good sealing performance
　　Because welded structures can be completely sealed, they can be made into high-pressure vessels, large oil pools, and pressure pipelines with good airtightness and water tightness.
　　5. Steel structures are heat-resistant but not fire-resistant
　　When the temperature is below 150℃, the properties of steel change very little. Therefore, steel structures are suitable for hot workshops, but when the surface of the structure is subjected to thermal radiation of around 150℃, heat insulation plates should be used for protection. When the temperature is between 300℃ and 400℃, the strength and elastic modulus of steel decrease significantly, and when the temperature is around 600℃, the strength of steel tends to zero. In buildings with special fire protection requirements, steel structures must be protected with fire-resistant materials to improve the fire rating.
　　6. Steel structures have poor corrosion resistance
　　Especially in humid and corrosive environments, they are prone to rust. Generally, steel structures require rust removal, galvanizing, or coating, and require regular maintenance. For marine platform structures in seawater, special measures such as "zinc block cathodic protection" should be used for corrosion prevention.
　　7. Low-carbon, energy-saving, environmentally friendly, and reusable
　　The demolition of steel structures produces almost no construction waste, and the steel can be recycled and reused.