What is a Prefabricated Panel House

A prefabricated panel house is a type of house constructed primarily using prefabricated panels, known for its convenience in construction but relatively weaker structural performance.

I. Components and Types of Prefabricated Panel Houses
Prefabricated panels are cement components manufactured in factories. During production, wooden models are nailed together, steel bars are arranged, and cement is poured to form the panels, which come in two types: solid and hollow. The hollow structure achieves lightweighting by reducing the non-load-bearing concrete, but the scientific arrangement and quantity of internal steel bars are generally inferior to those of cast-in-place concrete structures.

II. Construction Process and Characteristics

1. Traditional Prefabricated Panel Houses: Taking a rural case in South Korea as an example, the construction process involves leveling the foundation and pouring a cushion layer, installing foundation piles, and then assembling crossbeams. After the concrete sets, footplates are installed and fixed to the cushion layer with expansion screws. Subsequently, crossbeams are installed like building blocks, adjusted with a level, and secured with nuts. Gaps are filled with foam and sealed with cement, and finally, soil is backfilled to complete the foundation frame. This construction method relies on the assembly of prefabricated panels, resulting in relatively weak overall integrity.
2. Chinese Modular Prefabricated Houses: These houses are disassembled into independent modules (such as ceilings, floors, and plumbing and electrical lines) and fully prefabricated in factories before being transported to the site for assembly. The construction period is reduced by more than 60% compared to traditional buildings, but attention must be paid to the design of connection nodes between modules to ensure structural safety.

III. Disadvantages of Prefabricated Panel Houses

1. Low Structural Strength: Assembled from prefabricated panels, these houses lack the integrity of cast-in-place concrete, resulting in inherent weaknesses in firmness and toughness, making them prone to damage under external forces such as earthquakes.
2. Short Service Life: Although the hollow design reduces weight, long-term use can lead to issues such as wall cracks and water leakage, and the risk of steel bar corrosion is higher than that of cast-in-place structures.
3. Poor Thermal Insulation: The high thermal conductivity of the materials results in insufficient thermal insulation in winter and heat insulation in summer, requiring additional insulation layers for improvement.
4. Weak Seismic Performance: The distribution and connection methods of steel bars are less scientific than those of cast-in-place houses, making it difficult to meet seismic requirements in high-intensity earthquake zones.

IV. Suitable Scenarios and Improvement Directions
Prefabricated panel houses are suitable for low-rise temporary buildings or scenarios with low structural requirements. To enhance performance, improvements can be made by optimizing steel bar configurations, strengthening connection nodes, and using high-performance insulation materials, but the cost-effectiveness must be considered.