House with Prefabricated Panels

When constructing a house with prefabricated panels, it is necessary to comprehensively consider various factors such as production, dimensions, uses, advantages and disadvantages, and usage precautions.

Production and Types

Prefabricated panels are cement components produced in factories. During production, wooden molds are first nailed together, then steel bars are arranged, and cement is poured to form the panels. They come in two types: solid and hollow. The hollow structure achieves lightweighting by reducing the non-load-bearing concrete, ensuring load-bearing capacity while reducing material usage.

Dimensions and Specifications

The length of prefabricated panels ranges from 3 meters to 4.2 meters, increasing in increments of 30 centimeters. Transport risks significantly increase for lengths exceeding 4.2 meters. There are two standard widths: 50 centimeters and 60 centimeters. The thickness should be selected based on the usage scenario; 12 centimeters is sufficient for ordinary rooms, while for second floors or load-bearing applications, a thickness of at least 15 centimeters is required to ensure structural safety.

Architectural Uses

Prefabricated panels have a wide range of applications, commonly used in non-load-bearing structures such as ditch covers beside roads and roof insulation layers. In residential construction, they were once widely used for floor slab installation. However, due to insufficient seismic performance, their use has been prohibited in modern commercial housing. Some self-built houses still use them, but strict structural safety assessments are required.

Advantages and Disadvantages Analysis

Advantages: Low cost and high construction efficiency; the main structure of a three-story house can be completed in 9 days, significantly shortening the construction period. Disadvantages:

1. Poor durability: Cracks and leaks are prone to occur after about 10 years of use, requiring regular maintenance;
2. Weak seismic performance: Poor overall integrity makes them prone to fracture and collapse during earthquakes, posing safety hazards;
3. Low comfort: Poor sound insulation and thermal insulation effects affect the living experience;
4. Limited lifespan: The designed service life is approximately 30-50 years, requiring early planning for renovation and replacement.

Usage Precautions

1. Thickness selection: Avoid choosing overly thin prefabricated panels to save costs; for second floors and above or load-bearing applications, prioritize panels with a thickness of over 15 centimeters;
2. Length specifications: Refuse custom-made extra-long panels from merchants and strictly adhere to standard lengths (3-4.2 meters) to ensure transport and installation safety;
3. Load-bearing calculation: Reserve a safety margin based on actual usage needs to avoid structural damage caused by overloading;
4. Policy compliance: The use of prefabricated panels in self-built houses must comply with local building codes. For dilapidated house renovations, prioritize repair and reinforcement, and only demolish buildings that meet the criteria for dilapidated houses.