Steel structure is composed of steel materials, and is one of the main types of building structures.
The structure is mainly composed of steel beams, steel columns, and steel trusses. Other members made of section steel and steel plates, and welding seams, bolts or rivets are usually used to connect each member or members. Due to its light weight and simple construction, it is widely used in large workshops, stadiums, super high-rise buildings and other fields.
- The steel structure is light in weight. Although the bulk density of steel structure is large, its strength is much higher compared with other building materials, so when the load and conditions are the same, steel structure is lighter than other structures, easy to transport and install, and can span a larger span；
- The plastic and ductile steel good plastic, the steel structure generally will not be due to accidental overload or local overload and sudden fracture failure. Good toughness makes the steel structure more adaptable to dynamic load.These properties of steel provide sufficient guarantee for the safety and reliability of steel structure；
- The steel is closer to the homogeneous and isotropic steel. The internal structure of the steel is relatively uniform, which is very close to the homogeneous and isotropic steel. It is almost completely elastic within a certain stress range.These properties are in accordance with the assumptions in the mechanical calculation, so the calculation results of the steel structure are more in line with the actual stress situation；
- The steel structure is easy to manufacture, easy to adopt industrial production and short construction and installation period. Steel structure is composed of various profiles, easy to make.A large number of steel structures are manufactured in specialized metal structure manufacturers;High accuracy.The components are transported to the site for assembly and bolted together. The structure is light, so the construction is convenient and the construction period is short. In addition,existing steel structures can be easily dismantled, reinforced or modified；
- Good air-tightness and water-tightness of the steel structure；
- Good heat resistance of steel structure, but poor fire resistance. Steel resists heat rather than heat. As the temperature rises, the strength decreases. When radiant heat is present and the temperature is above 150 degrees, shielding measures should be taken. In the event of a fire, when the temperature of the structure reaches above 500 degrees, all instantaneous collapse may occur. In order to improve the fire resistance of steel structures, they are usually wrapped in concrete or brick；
- The steel is easy to rust, should take protective measures of steel in the humid environment, especially in the environment of corrosive medium., Must brush paint or galvanized, but also should be regularly maintained during the use.
