Steel structure workshops are destined to have a strong construction market share due to their beautiful appearance, short construction period, high degree of industrialization, and resource reuse. The cost of steel structure workshops is also a concern of many people. The ability to control the cost of steel structure workshops and give full play to the technical advantages of steel structure workshops is the key research object of many steel structure enterprises. Among them, there are three main factors affecting the cost of steel structure workshops:
1. Raw Material Factor
Steel and plates are the main components of the steel structure factory building, accounting for about 70%-80% of the total cost of the steel structure factory building. The fluctuation of the market price of steel structure raw materials directly affects the cost of the steel structure factory building. There is a big difference between the material of the section steel and the load surface, the thickness of the enclosure plate and the price of the material. Steel structure raw materials are the main factor in the construction cost of steel structure.
2. Design Factors
Reasonable design is the fundamental issue 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 changes in the amount of raw materials and directly affect the total cost of steel structure workshops.
A. Basic design: The basic cost is closely related to the geology where the steel structure workshop is located. The basic construction period accounts for about 25% of the total construction period of the steel structure workshop, and the basic cost is 15% of the total cost of the steel structure workshop. When designing, we should pay attention to the geological report of the plant location, choose a reasonable foundation type, and control the loading surface and buried depth of the foundation, which has a positive effect on the total cost of the steel structure plant.
B.. Steel beam design: Rectangular cross-section beam is the most common bending member, which is often used in design, but the material utilization rate is very low. One is because the material stress near the neutral axis is lower; the other is that the bending moment of the beam varies along the length of the beam. Due to the low stress in most sections of the uniform cross-section beam, the material is not well used, and the material utilization rate can be improved only when the axial center is stressed. Therefore, a plane truss can be used to replace a rectangular beam in the design. The plane truss is equivalent to a hollowed out beam, and the excess material in the beam is taken out, which is economical and self-weight can be reduced. It can also be developed into a space grid, and the utilization rate of materials can be greatly improved.
C. Column network design: The column network 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. Under normal circumstances, the optimal spacing of portal frames is 6m-9m. When large-tonnage cranes are installed, the economical column spacing is generally 7m-9m. It 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 column grid layout is reasonable has a great impact on the cost of steel structure factory buildings.
3. Construction And Installation Factors
The length of the construction period is also a part of the cost of the steel structure factory building in Yingxi, and the proficiency of the installation technology is the main reason for the length of the construction period. The construction of a structural factory building is a systematic project, involving a wide range of factors and many influencing factors. The construction period, policy changes, and large amount of work can all affect the cost of the steel structure factory building.
