How Thick Are Prefabricated Houses?

The wall panel thickness of prefabricated houses is commonly around 120mm, with 150mm specifications also available, with 120mm being the more prevalent thickness. Here is a detailed introduction to the thickness of prefabricated houses:

1. Common Thickness Specifications
The wall panel thickness of prefabricated houses is typically based on 120mm, a specification widely used in light steel structures or modular buildings. Its design is primarily based on a balance between structural strength, thermal insulation performance, and material cost-effectiveness. For example, a 120mm wall panel can meet the load-bearing requirements of general living spaces while achieving basic thermal insulation through internal filling with insulation materials (such as polystyrene boards or rock wool). If enhanced thermal insulation is needed or to adapt to special climatic conditions, some projects may adopt 150mm-thick wall panels, increasing material thickness to improve thermal resistance and reduce energy consumption.

2. Thickness and Functional Adaptability
The choice of wall panel thickness should be combined with specific usage scenarios. 120mm wall panels are suitable for low-rise residential buildings or temporary structures in dry, mild climate zones, offering advantages such as less material usage, lighter weight, and reduced transportation and installation costs. 150mm wall panels are more commonly found in scenarios requiring the embedding of water and electricity pipelines or in areas with higher requirements for sound insulation and fire resistance. For example, in wet environments like kitchens and bathrooms, where pipeline space needs to be reserved, a 150mm thickness can avoid structural instability caused by wall slotting; while public buildings like hospitals and schools may increase thickness to enhance fire resistance limits and meet fire safety regulations.

3. Association Between Thickness and Structural Safety
Wall panel thickness directly affects the building's lateral resistance performance. In earthquake-prone areas, 150mm wall panels, with their larger cross-sectional moment of inertia, can better resist horizontal loads and reduce deformation risks. Additionally, thick wall panels can disperse localized concentrated loads (such as furniture hanging or equipment installation), reducing the probability of cracking. For example, in a comparative test of a modular building project, it was found that a 150mm wall panel reduced structural damage by 40% compared to a 120mm wall panel during a simulated magnitude-8 earthquake, verifying the critical role of thickness in safety.

4. Comprehensive Consideration of Thickness Selection
In actual engineering, the determination of wall panel thickness needs to consider factors such as cost, construction period, and functional requirements. Due to its high construction efficiency and low material cost, 120mm wall panels remain the mainstream choice in the market; while 150mm wall panels, although requiring higher initial investment, can reduce maintenance costs (such as pipeline repairs and thermal insulation upgrades) in the long run, making them suitable for projects with high durability requirements. During the design phase, structural calculations and thermal simulations should be conducted to optimize thickness parameters and achieve the best balance between performance and economy.