What are the inspection items for steel structures?

The steel structure project should be submitted for inspection.

1. Steel strength testing;

2. Cross-sectional size detection of steel columns and steel beams;

3. Weld quality inspection of steel components;

4. Torque detection of high-strength bolts;

5. Verticality detection of steel columns;

6. Steel beam deflection detection;

7. Detection of the thickness of the anti-corrosion coating of steel components.

Steel structure engineering to be sent for inspection.

1. Imported steel from abroad;

2. Steel mixed batch;

3. The thickness of the plate is equal to or greater than 40mm, and the thick plate is designed with Z-direction performance requirements;

4. The safety level of the building structure is first-class, and the steel used in the main stressed components of the long-span steel structure;

5. Steel designed with re-inspection requirements;

6. Steel with doubts about quality. Number of inspections: All inspections. Inspection method: check the re-inspection report.

7. The welding materials used in important steel structures should be sampled and re-tested, and the re-inspection results should meet the current national product standards and design requirements. Number of inspections: All inspections. Inspection method: check the re-inspection report.

8. The torque coefficient of the high-strength large hexagonal head bolt connection pair shall be inspected in accordance with the provisions of Appendix B of this specification, and the test results shall comply with the provisions of Appendix B of this specification.

Inspection quantity: The bolts for re-inspection should be randomly selected in the batch of bolts to be installed at the construction site, and 8 sets of connecting pairs should be selected for re-inspection in each batch. Inspection method: check the re-inspection report.

9. The torsional shear high-strength bolt connection pair shall be tested for pretension in accordance with the provisions of Appendix B of this specification, and its test results shall comply with the provisions of Appendix B of this specification.

Inspection quantity: The bolts for re-inspection should be randomly selected in the bolt batch to be installed at the construction site, and 8 sets of connecting pairs should be selected for re-inspection in each batch. Inspection method: check the re-inspection report.

Steel structures are generally divided into:

1. Raw material testing: steel, high-strength bolts.

Wait. 2. Construction testing: weld testing of steel component manufacturers, on-site construction weld testing, etc.

3. On-site inspection: bolt inspection, high-strength bolt connection inspection, verticality.

inspections, etc. Thank you.

I heard from a friend of mine who described the composite steel structure that the items to be tested in the composite steel structure are: the detection of the strength of the steel structure, the detection of the cross-sectional size of the steel structure, the detection of the quality of the weld of the steel structure and the detection of the quality of the bolts on the steel structure.

The steel structure project should be submitted for inspection. 1. Steel strength testing;

2. Cross-sectional size detection of steel columns and steel beams;

3. Weld quality inspection of steel components;

4. Torque detection of high-strength bolts;

5. Verticality detection of steel columns;

6. Steel beam deflection detection;

7. Detection of the thickness of the anti-corrosion coating of steel components.

Ultrasound testing.

Ultrasonic testing is a technology that uses ultrasonic waves to propagate in metal, non-metallic materials and their workpieces, and the changes in the acoustic properties and internal structure of materials (workpieces) have a certain impact on the propagation of ultrasonic waves, and understand the changes in the properties and structure of materials (workpieces) through the detection of the degree and condition of ultrasonic influences.

Ultrasonic testing, like radiographic inspection, is mainly used to detect internal defects in materials (workpieces). The detection sensitivity is high, the operation is convenient, the detection speed is fast, the cost is low and there is no harm to the human body, but the ultrasonic testing cannot determine the nature of the defect; There is no original record of the test results, and the traceability is poor.

Ultrasonic testing also has incomparable advantages of radiographic testing, which can detect complex components such as special-shaped components, fillet welds, and T-shaped welds; At the same time, it is also possible to detect the depth of burial of defects in the material (workpiece).

1.Steel strength testing;

2.Steel column and steel beam cross-sectional size detection.

3.weld quality inspection of steel components;

4.Torque detection of high-strength bolts;

5.Verticality detection of steel columns;

6.steel beam deflection detection;

7.Detection of the thickness of the anti-corrosion coating of steel components.

8.Inspection of the appearance quality of steel structures.

The steel structure needs to be sent for inspection, mainly when we make steel components, the raw materials of steel plates. The second is the anti-slip component. There are also high-strength bolts.

The embedded parts are also the raw materials of round bars. Rock wool boards also need to be sent for inspection. If your steel structure project still involves the installation of doors and windows, then the windows also need to be destroyed and sent for inspection, including glass jujube glazed rock reeds and profiles.

The steel structure needs to be tested: after the steel structure is erected, it is also necessary to test its non-destructive condition, which includes the penetration test, and also includes the ultrasonic test. The quality of the steel structure should be strictly tested, first of all, whether the welding is up to standard, whether there is any damage problem, here can be detected by ultrasonic or X-ray, and the process should be evaluated.

Including the installed bolts, its pretension should meet the test standard. In addition, the steel structure needs to be brushed with fireproof coating, which is also an important step to achieve fire detection. The steel used in the steel structure also needs to be tested for chemical composition.

Because the steel needs to test its prestress, it needs to meet various performance indicators, such as fasteners, mechanics, etc.

Construction Law of the People's Republic of China

Article 7 Before the start of the construction project, the construction unit shall, in accordance with the relevant provisions of the State, apply to the people's construction administrative department at or above the county level where the project is located to obtain a construction permit; However, the exception is for minor works below the limit determined by the construction administrative department.

Construction projects that approve the commencement report in accordance with the authority and procedures specified in the *** will no longer receive a construction permit.

The material to be submitted for inspection in the steel structure project is the steel designed with re-inspection requirements; steel with questionable quality; welding materials used in important steel structures; torsional shear high-strength bolt connection steel grid structure of auxiliary building; Welding ball joints and other materials. The steel structure project to be submitted for inspection is steel strength testing; Steel column and steel beam cross-sectional size detection. weld quality inspection of steel components; Torque detection of high-strength bolts; Verticality detection of steel columns; steel beam deflection detection, etc.

Article 16 of the Regulations on the Quality Management of Construction Projects After the construction unit receives the completion report of the construction project, it shall organize the design, construction, engineering supervision Yu Yuli and other relevant units to carry out the completion acceptance. The completion and acceptance of the construction project shall meet the following conditions: (1) the completion of the construction project design and the contents agreed in the contract; (B) have a complete technical file and construction management information; (C) the main building materials, building accessories and equipment used in the project approach test report; (D) survey, design, construction, engineering supervision and other units signed by the quality of the documents; (5) There is a project warranty signed by the construction unit.

If the construction project experience is qualified, it can be delivered.

Legal analysis: the items to be submitted for inspection of steel structure projects include: steel strength testing; Steel column and steel beam cross-sectional size detection. weld quality inspection of steel components; Torque detection of high-strength bolts; Verticality detection of steel columns; steel beam deflection detection; Detection of the thickness of the anti-corrosion coating of steel components. Inspection of the appearance quality of steel structures. Inspection of the appearance quality of steel structures.

Legal basis: Article 6 of the Product Quality Law of the People's Republic of China The State encourages the implementation of scientific quality management methods, the use of advanced science and technology, and encourages the quality of enterprise products to meet and exceed industry standards, national standards and international standards. Units and individuals with advanced product quality management and product quality reaching the international advanced level and outstanding achievements will be rewarded.

First, the steel structure project to be sent for inspection:

1. Imported steel from abroad;

2. Steel mixed batch;

3. Thick plate equal to or greater than 40mm, and designed with z-direction performance requirements;

4. The safety level of the building structure is first-class, and the steel used in the main stressed components of the long-span steel structure;

5. Steel designed with re-inspection requirements;

6. Steel with doubts about quality.

7. Welding materials used in important steel structures.

8. High-strength large hexagon head bolt connection pair.

9. Torsional shear high-strength bolt connection pair.

10. Steel structure production and installation unit.

11. The safety level of the building structure is level 1, and the steel grid structure of public buildings with a span of 40m and above 12 and welded ball nodes.

13. a bolt ball node.

Second, the steel structure engineering to be submitted for inspection items include: steel strength testing; Steel column and steel beam cross-sectional size detection. weld quality inspection of steel components; Torque detection of high-strength bolts; Verticality detection of steel columns; steel beam deflection detection; Detection of the thickness of the anti-corrosion coating of steel components. Inspection of the appearance quality of steel structures. Inspection of the appearance quality of steel structures.