Replacement of Prefabricated Panels in Rural Houses

Replacing prefabricated panels in rural houses requires careful operation and strict adherence to standardized procedures to ensure safety.

Prerequisites for Operation: Clarify Wall Nature and Legal Risks

Replacing hollow prefabricated panels involves structural modification of the house. The primary task is to determine whether the walls are load-bearing. If the original walls are load-bearing, direct replacement may compromise their load-bearing function, leading to structural instability of the house, violating the requirement in Article 44 of the Construction Law to 'prevent production safety accidents,' and potentially causing collapse and other safety incidents. Therefore, it is essential to clarify the nature of the walls through professional testing to avoid blind construction.

Operational Steps: Implement in Stages According to Standards

1. Commission a Professional Institution for Testing
   Hire a qualified building testing agency to conduct a comprehensive assessment of the wall nature (load-bearing/non-load-bearing) and the original floor structure (prefabricated panels/cast-in-place). The test results will determine whether the conditions for 'replacing panels without demolishing walls' are met, providing a scientific basis for subsequent construction.

2. Select Appropriate Prefabricated Panels and Develop an Installation Plan
   Based on the test results, choose hollow prefabricated panels that match the size and load of the original floor to avoid uneven structural stress due to mismatched specifications. Simultaneously, a professional construction team should develop a detailed installation plan, specifying the methods for removing old panels and securing new ones, ensuring that the construction process does not damage the wall structure.

3. Supervise Safety Measures Throughout the Construction Process
   During the replacement process, appropriate lifting equipment must be used (such as cranes, hoists, etc.), and temporary support and protection measures should be taken (such as erecting scaffolding, setting up temporary load-bearing beams) to prevent walls or floors from collapsing due to changes in stress. The construction team must strictly adhere to safety regulations, and construction personnel should wear safety protective gear.

4. Post-Construction Quality Inspection
   After the replacement is completed, a testing agency should be commissioned again to inspect the new floor and walls, confirming structural safety, secure connections, and the absence of cracks or deformations and other hazards. The house can only be put into use after passing the inspection.

Disadvantages of Prefabricated Panels: Weigh the Pros and Cons

• Non-earthquake-resistant: Prefabricated panels are拼接 (spliced) structures with poor integrity, making them prone to fracture and collapse during earthquakes.
• Prone to cracks and leakage: With limited load-bearing capacity, the joints are susceptible to cracks due to settlement or temperature changes, leading to leakage.
• Poor sound insulation: The hollow structure results in unsatisfactory sound insulation, affecting living comfort.
• Risk of inferior products: Some inferior prefabricated panels lack steel reinforcement support and are made with shoddy materials, posing serious safety hazards.

Summary: Replacing prefabricated panels in rural houses should prioritize safety, strictly following standardized procedures for testing, material selection, construction, and inspection. Additionally, fully assess the seismic resistance, waterproofing, and other performance deficiencies of prefabricated panels to ensure the structural stability and living safety of the renovated house.