Type of steel structure

Steel is characterized by high strength, light weight, rigidity, it is used to create a large span and ultra-high, super-heavy type of building materials particularly suitable; data homogeneity and good isotropic, is the ideal elastic body, the most common engineering Mechanics of the basic assumptions; data plasticity, good tolerance, can have greater deformation, can be an excellent dynamic load; short construction period; its high degree of industrialization, can be specialized high degree of mechanization produced; processing high precision and high efficiency , Good airtight, it can be used to create cylinders, tanks and transformers. The drawback is poor fire resistance and corrosion resistance.
    Mainly used for heavy-duty frame of the load-bearing frame, by the dynamic load of the plant structure, plate and shell structure, upright TV tower and mast construction, bridges and libraries and other large span structure, high-rise and high-rise building. In addition to rolling new varieties of steel, such as H-beam (also known as wide flange type steel) and T-shaped steel and pressure-type steel plate, etc. to get used to the large-span steel structure, such as high-strength steel, Construction and super high-rise building needs. Steel structure is divided into light steel and heavy steel. Concluded that there is not a common specification, many experienced planners or project managers often can not say that understanding can be summed up with some data to consider and to determine:
    First, heavy steel structure
    1, plant crane lifting weight: ≥ 25 tons.
    2, the amount of steel per square meter: ≥ 50KG / M2. Such as: petrochemical plant equipment, power plants, large-span stadiums, exhibition centers, high-rise or high-rise steel structure.
    Second, light steel structure

    The thickness of the main components: ≥ 10MM. Light steel is also a relatively confusing term, usually can have two kinds of understanding. One is the current "Steel Construction Planning Code" (GBJ 17-88) in Chapter XI "round steel, small angle steel light steel structure" refers to the use of round and less than L45 × 4 and L56 × 36 × 4 Angle steel production of light steel structure, mainly in the lack of steel for the construction of concrete structures should not be used for small-scale construction, is now basically not selected, so the steel structure planning revision has been fundamentally tend to get rid of.

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