Can Prefabricated Panel Houses Still Be Used?

Whether prefabricated panel houses can continue to be used depends on the situation:

I. Buildings with Two Floors or Less For low-rise buildings with two floors or less, if homeowners aim to reduce construction costs, prefabricated panels can still be a viable option. Their advantages include fast production speed, short construction period, and relatively low cost. In low-rise buildings with small loads, after reasonable design and standardized construction, prefabricated panels can meet basic structural requirements. For example, in rural self-built houses or small commercial buildings with a low number of floors, using prefabricated panels can effectively control costs and shorten the construction period.

II. Buildings with More Than Two Floors It is not recommended to use prefabricated panels for buildings with more than two floors. As the number of floors increases, the load significantly rises, demanding higher load-bearing capacity and overall stability from the floor slabs. Prefabricated panels have obvious deficiencies in terms of integrity and seismic performance:

• Seismic Risk: In earthquake-prone areas, using prefabricated panels may increase the risk of building damage. Their connection method is mostly splicing, and during an earthquake, they are prone to structural damage due to loose connections.
• Durability Issues: During transportation and installation, prefabricated panels may suffer damage to the panel body or loose connections due to collisions and vibrations, affecting the overall quality and service life of the building.
• Structural Limitations: Cast-in-place floor slabs form a continuous structure through integral pouring, while prefabricated panels are spliced in blocks, making it difficult to meet the stringent requirements for structural integrity in high-rise buildings.

III. Old Prefabricated Panel Houses The disposal of old prefabricated panel houses should be based on safety assessments:

• Safe Houses: If they are identified by professional institutions as having no safety hazards and are not included in urban renewal or demolition plans, they can continue to be used after renovation (such as exterior wall painting, water and electricity renovation, and roof repair).
• Design Life and Maintenance: The design service life of ordinary residential buildings is 50 years. Under normal construction and maintenance, no major repairs are required within 50 years. After expiration, if they pass inspections and are repaired and reinforced, they can still be safely inhabited.
• Demolition Criteria: Only when a house is identified as having safety hazards (such as structural cracks, settlement, etc.) or has been included in demolition plans should it be demolished and rebuilt.

Summary: The suitability of prefabricated panel houses depends on the number of building floors, safety conditions, and maintenance status. Low-rise buildings can consider using them when cost is a priority, while high-rise buildings should avoid them. Old houses should be decided on their fate through professional assessments rather than being demolished indiscriminately.