Steel structure workshops are destined to have a strong construction market share due to their beautiful appearance, short construction period, the high degree of industrialization, and resource reuse. The cost of steel structure workshops is also a matter of concern to many people. It is the key research object of many steel structure enterprises to control the cost of steel structure workshops and to play the technical advantages of steel structure workshops. Among the factors that affect the cost of steel structure workshops are three aspects:
A Raw material factor
Steel and plate are the main components of the steel structure plant, accounting for about 70%-80% of the total cost of the steel structure plant. The fluctuation in the market price of steel structure raw materials directly affects the cost of the steel structure plant. The material and load surface of the section steel, the thickness and material of the enclosing plate vary greatly in price. The raw material of steel structure is the main factor of the cost of the steel structure factory building.
B Design factors
Reasonable design is the fundamental problem of saving raw materials and controlling the cost of steel structure workshops. The different design schemes of steel structure workshops are an important reason for the change of the raw material value of the steel structure, which directly affects the total cost of the steel structure factory.
1. Basic design: The basic cost is closely related to the geology of the location of the plant. The basic construction period takes about 25% of the total period of the plant, and the basic cost is 15% of the total cost of the steel structure plant. When designing, it is necessary to pay attention to the geological report of the location of the plant, choose a reasonable foundation type, and control the load surface and burial depth of the foundation have played a positive role in the total cost of the steel structure plant.
2. Steel beam design: The rectangular beam is the most common bending member, which is often used in the design, but the material utilization rate is very low. One is because the material stress near the neutralization axis is low; the other is that the bending moment of the beam changes along the beam length. Due to the low stress in most sections of the equal section beam, the material is not well utilized, and the material utilization rate can be increased only when the shaft is stressed. Therefore, a flat truss can be used instead of a rectangular beam in the design. The flat truss is equivalent to a hollowed-out beam, and the excess material in the beam is removed, which is economical, self-weight, and lighter. It can also be developed into a space grid, and the utilization rate of materials can be greatly improved.
3. Column grid design: The column grid layout is to determine the span and spacing of the columns. When the process requirements allow, it is more economical to choose a small-span portal frame as much as possible. Under normal circumstances, the optimal spacing of the portal frame is 6m-9m. When a large-tonnage crane is installed, the economic column distance is generally 7m-9m, and should not exceed 9m. When it exceeds 9m, roof purlins, crane beams and wall frames The amount of steel used in the system will increase accordingly, and the cost is not economical. Therefore, whether the layout of the column network is reasonable has a great influence on the cost of the steel structure workshop.
C Construction and installation factors
The length of the construction period is also part of the cost of the steel structure factory building. The proficiency of the installation technology is the main reason for the length of the construction period. The construction of structured factory buildings is a systematic project, involving a wide range of areas and many influencing factors. The construction period, policy changes, and large amount of engineering can all affect the cost of steel structure factory buildings.