Materials commonly used in most factory buildings are steel. To ensure the safety of these steel structures, it is necessary to inspect the steel, making structural safety inspections and certifications indispensable. What specific aspects should be checked during the inspection and certification of these factories?

1. Gather basic information on the steel structure factory building, such as the factory's purpose, structural layout, construction date, number of floors, and various drawings of the factory.

2. Verify the steel frame layout, precast component specifications, and floor heights based on the factory engineering drawings collected in Step 1. For factories without relevant engineering drawings, on-site measurements and drawing creation are required immediately.

3. Record the current status of steel prefabricated components in steel structural workshops, such as rust, damage to connection points, coating loss, defects in electric welding appearance, and the tightness of connections, and conduct inspections and evaluations one by one.

4. A certain number of steel structural prefabricated components are selected for ultrasonic or magnetic particle inspection as welding detection according to relevant specifications and standards. Evaluate whether defects such as weld spatter, arc pit cracks, and arc burn-through exist.

5. Utilize total stations to measure the deflection values of steel trusses, truss structures, and components, determining if their degree of deformation falls within the specified range.

6. The compressive strength of stainless steel sheets determines the safety of steel structural components, thus, surface strength testing methods must be employed.

7. Steel structure factory buildings in use will have their anti-corrosion and safety coatings on prefabricated components affected by environmental factors. Therefore, it is necessary to inspect the thickness of the anti-corrosion or fire safety coatings on steel prefabricated components.

8. Based on the inspection data obtained from the above structural steel component checks, conduct a series of calculations on the upper structural bearing capacity of the steel structure factory building according to relevant architectural design standards. Determine if the current-stage bearing capacity of the steel structure factory building meets national standards and safety application regulations for the later stages.

9. According to relevant specification standards, assess the current safety level of steel structural factory buildings, and propose effective solutions for prefabricated components that do not comply with safety application regulations and those experiencing structural damage at the current stage.

Certification Basis and Content for Steel Structure Factory Inspection

"Standard for Reliability Assessment of Industrial Buildings (GB 50144-2019)"

2. "Standard for Evaluation of House Condition and Damage Level"

"Standard for Evaluation of Hazardous Buildings (JGJ 125-2016)"

"Code for Measurement of Building Deformation (JGJ 8-2016)"

5. "Standard for Building Structure Inspection Technology" (GB/T 50344-2019)

6. "Code for Design of Concrete Structures" (GB 50010-2010 2015 Edition)

7. "Code for Design of Building Structures Load Requirements" (GB 50009-2012)

8. "Technical Code for Reinforcement Detection in Concrete (JGJ/T 152-2008)"

9. "Technical Code for Concrete Strength Testing by Core Method" (JGJ/T 384-2016)

10. "Standard for Seismic Evaluation of Buildings (GB 50023-2009)"

11. "Code for Reinforced Concrete Structure Strengthening Design" (GB 50367-2013)

12. Specification for Steel Structure Design (GB 50017-2017)

13. Other technical standards, specifications, and procedures required by national regulations such as "Statistical Treatment and Interpretation of Outliers in Normal Samples" (GB/T 4883-2008).

14. Original architectural design documents, reinforcement construction materials, renovation construction drawings, on-site inspections, and testing results, etc.

Structural steel workshop inspection and appraisal of assessment conclusions

Based on the "Standard for Identification of Dangerous Buildings" and the "Standard for Reliability Identification of Civil Buildings" and other regulations and standards, conduct a comprehensive assessment of the building's safety. Compile the identification report in accordance with the principles of objectivity, science, and fairness, and propose identification conclusions as well as preliminary measures and methods for handling.