Prefabricated House Quality Inspection

Prefabricated house quality inspection falls within the scope of housing quality inspection and appraisal, and must be carried out by qualified inspection units. It covers types such as structural safety, seismic capacity, repair quality of load-bearing structures, and safety investigations, with the inspection process relying on a technical system and complying with qualification management requirements.

Inspection Types and Applicable Scenarios

1. Structural Safety Inspection and Assessment: When prefabricated houses show dangerous signs such as cracking, tilting deformation, or aging, or when changes in use function or local structural layout may affect safety, or when the design service life has been exceeded and continued use is required, a comprehensive inspection of the structural status is necessary. Through calculation and analysis, the structural safety status is assessed to determine whether there are issues such as insufficient load-bearing capacity or stability defects, providing a basis for subsequent reinforcement or renovation.
2. Seismic Capacity Appraisal: When seismic fortification requirements are increased, use functions or structural layouts are changed (such as expansion or renovation), or when there is a need to understand the seismic performance of existing houses, the structural seismic construction measures, reliability of component connections, and overall seismic load-bearing capacity must be inspected. The appraisal results can guide seismic reinforcement design to ensure that the house has the expected safety performance during earthquakes.
3. Identification of Load-Bearing Structure Damage and Assessment of Repair Quality: Focus on the damage conditions of core components such as beams, columns, slabs, walls, and foundations. Through on-site investigations and material performance tests, the scope and extent of damage are accurately identified. At the same time, a comprehensive assessment is conducted on the compliance of repair construction techniques, material quality, and structural performance after repair, providing technical support for project acceptance, liability determination, and long-term safety management.
4. Housing Safety Investigations: Through systematic inspections, identify potential safety hazards in the structure of prefabricated houses, clarify the types of hazards (such as cracks, corrosion, deformation), their distribution ranges, and hazard levels. The investigation results can guide the prioritization of hazard rectification and provide a scientific basis for formulating maintenance and repair plans to prevent safety accidents.

Inspection Technical System and Qualification Requirements
The inspection process must rely on CMA-certified institutions, integrating laboratory testing (such as material strength testing, concrete carbonation depth testing), structural calculations (analyzing load-bearing capacity through finite element models), and on-site monitoring (such as real-time monitoring of tilt rates and crack widths) to form a multi-dimensional assessment system. Inspection institutions must obtain the corresponding qualifications in accordance with the "Administrative Measures for the Inspection of Construction Engineering Quality" and carry out activities within the permitted scope to ensure the authority and legal effect of inspection reports.