What are the steel structure and inspection items

Steel structure? The main structure of steel production is one of the main types of building structure. The characteristics of steel are high -strength, light weight, good overall rigidity, and strong deformation capacity, so it is especially suitable for building large spans and high and overweight buildings; , The basic assumptions of general engineering mechanics; the material is plastic and tough, and it can have a large deformation and can withstand the power load well; the construction period is short; its high degree of industrialization can perform professional production with high degree of mechanization.
The steel structure engineering should be sent for inspection materials:
1, foreign imported steel;
2, a mixed batch of steel;
3, equal to or greater than 40mm, and designed thick boards with Z directional requirements for performance requirements ;
4, the safety level of the building structure is one level, and the steel used in the main force components in the large span steel structure;
5, the design of steel with re -inspection requirements;
6, doubt about quality of quality Steel.
7, welding materials used in important steel structures
8, high -strength large hexagonal head bolt connection sub - n9, twist -cut high -strength bolt connection sub - n10, steel structure production and installation unit
11, the safety level of the building structure is first -level, and a public building steel mesh structure with a span of 40m or above
12, the welding ball node
13, the bolt ball node
steel structure project should be delivered to the inspection project包括：钢材强度检测；钢柱、钢梁截面尺寸检测；钢构件焊缝质量检测；高强度螺栓的扭矩检测；钢柱垂直度检测；钢梁挠度检测；钢构件防腐涂层厚度的检测；钢Detection of structure appearance quality; detection of steel structure appearance quality.
The expansion information: At present, my country's steel structure enterprises are about 4,000-5,000. According to the statistics of the China Steel Structure Association, as of now, there are 238 units with the qualifications of steel structure manufacturing enterprises, but most of them are small and medium -sized enterprises with an annual output of less than 10,000 tons. There are only more than 30 companies with an annual output of more than 100,000. Most enterprises have a small production scale and the industry concentration is not high.
Legal basis: "Uniform Standards for Construction Quality Acceptance of Construction Projects" GB50300, the acceptance of the construction quality of steel structure engineering is based on the inspection batch, sub -project (sub -department (sub -project (sub -department (sub -department (sub -department (sub -department (sub -department (sub -department (sub -department (sub -department (sub -project Division) Projects. Generally speaking, the steel structure, as the main structure, belongs to the branch project, can be divided into several sub -projects according to the space stiffness unit of large steel structure projects; when the main structure contains steel concrete structures and masonry structures, the steel structure is just The project is a thousand sub -branch project; the steel structure sub -item project is divided in accordance with the main types, materials, and construction processes. This standard divides the steel structure project into 10 sub -projects. The division is divided into inspection batch for acceptance, which helps thousands of to correct the quality problems in the construction in time, ensure the quality of the project, and meet the actual needs of construction.