Inspection Report for Prefabricated Houses

The inspection report for prefabricated houses is primarily based on national standards for building safety assessment, clarifying safety levels and providing handling recommendations. It serves as the core basis for building disposal.

I. Assessment Standards and Safety Level Classification

The inspection of prefabricated houses adheres to national standards such as the Standard for Appraisal of Dangerous Buildings (JGJ 125-2016) or the Standard for Reliability Appraisal of Civil Buildings (GB50292-1999), classifying buildings into four safety levels: A, B, C, and D:

• Level A: The structural load-bearing capacity meets normal usage requirements, with no dangerous components, ensuring overall building safety.
• Level B: Some structural components show signs of aging (e.g., minor cracks, corrosion), but these do not affect the main structural safety, requiring regular monitoring.
• Level C: Some load-bearing structures fail to meet safety requirements, with local hazards (e.g., deformation of beams and columns, wall cracking), constituting a partially dangerous building that requires immediate reinforcement.
• Level D: The load-bearing structure is severely damaged, unable to meet safe usage requirements, constituting an entirely dangerous building with no repair value, necessitating demolition or reconstruction on the original site.

II. Inspection Content and Process

Inspection agencies determine the safety level through a comprehensive assessment of various parts of the building:

1. Foundation and Base: Check for foundation settlement or tilting, and corrosion or cracking of the base.
2. Superstructure: Examine the cracks, deformation, and corrosion of load-bearing components (beams, columns, slabs), assessing the overall structural stability.
3. Dangerous Components: Identify components with safety hazards (e.g., decayed wooden components, corroded steel components), determining whether they affect overall safety.
4. Special Inspection for Self-built Houses: For self-built prefabricated houses, inspect the quality of the main structure, structural safety (e.g., reliability of connection joints), and durability of prefabricated components.

III. Role of the Inspection Report

The inspection report serves as a direct basis for building disposal:

• Level A and B Buildings: Typically not eligible for demolition, prioritizing conventional renovations (e.g., exterior wall repairs, facility updates) to enhance functionality.
• Level C Buildings: Generally not directly demolished, requiring structural reinforcement (e.g., adding supports, repairing cracks) based on report recommendations to restore safety performance.
• Level D Dangerous Buildings: Due to lack of repair value, they must be demolished or reconstructed on the original site as per report requirements to avoid safety hazards.

IV. Inspection Agencies and Qualification Requirements

Inspection agencies must possess comprehensive or specialized qualifications and conduct inspection activities within their permitted scope. To apply for qualifications, they must meet personnel, equipment, and technical conditions, submitting relevant materials (e.g., technician certificates, inspection equipment lists) for review by the competent authorities.