Structural Diagram of Wood-Plastic Prefabricated Houses
Currently, there are no directly available specific structural diagrams of wood-plastic prefabricated houses, but their structural composition can be inferred based on their construction characteristics and typical cases. The structural design of wood-plastic prefabricated houses needs to combine the properties of wood-plastic materials with the functional requirements of the building. Its core construction typically revolves around systems such as walls, roofs, and floors, and achieves rapid assembly through standardized connection nodes. The following explains from two aspects: construction systems and case references.
Typical Construction Systems of Wood-Plastic Prefabricated Houses
The walls of wood-plastic integrated houses often use wood-plastic composite wall panels as the main enclosure structure. These wall panels are usually made from wood flour, plastic base materials, and additives through extrusion or molding processes, combining the processing properties of wood with the weather resistance of plastics. The interior of the wall panels may integrate insulation layers (such as polystyrene boards or rock wool) or pipeline channels, forming integrated structural-insulation-decoration components. The connection between the walls and the foundation or floor is often achieved through metal connectors to ensure structural stability.
The roof structure typically adopts a lightweight wooden frame system, with wood-plastic baseboards as the roof panels. Insulation cotton (such as glass wool or rock wool) and waterproof layers (such as TPO or PVC membranes) are laid on top to form a multi-layer composite insulation and waterproofing system. The roof surface is connected to the purlins through U-shaped brackets, which can adjust their height to accommodate the roof slope requirements of different buildings while providing space for pipeline installation. In some designs, ventilation openings are set at the ridge, utilizing the thermal pressure principle to promote indoor air circulation and enhance thermal comfort.
The floor system may adopt a combination of wood-plastic flooring + light steel joists, with insulation materials (such as extruded polystyrene boards) filled between the joists. The floor surface is treated for slip resistance. If the house has two or more floors, the floor must meet load-bearing requirements and may be reinforced by increasing the cross-sectional dimensions of the joists or adding support columns.
Structural References from Typical Cases
The Minas Residence (reference case) adopts a prefabricated wooden structural frame, with walls composed of a wooden frame and wood-plastic composite wall panels, featuring a separated design of the structural layer and the enclosure layer. The roof has a double-slope form with purlin spacing of 600mm. The roof panels are made of a composite structure of wood-plastic baseboards and waterproof membranes, with an insulation layer thickness of 150mm. This case achieves assembly of the main structure within 72 hours through standardized node design.
The Eco-Resort House on a Steep Slope (reference case) adopts a cantilevered structure in combination with the terrain, with some walls composed of a combination of wood-plastic composite wall panels and glass curtain walls, creating a transparent viewing space. The roof has a single-slope design, utilizing the lightweight properties of wood-plastic baseboards to reduce the load on the mountain structure. The roof drainage system is integrated into the U-shaped brackets, with hidden pipelines directing rainwater to the ground to avoid erosion of the mountain.
Key Points in Structural Design
The structural design of wood-plastic prefabricated houses needs to focus on material compatibility (such as anti-corrosion treatment of wood-plastic and metal connectors), node reliability (such as the shear strength of bolt connections or mortise-and-tenon joints), and thermal performance (meeting energy-saving standards by adjusting the thickness of the insulation layer and the thermal conductivity coefficient of the materials). In actual projects, the structural plan needs to be optimized according to climate zones, usage functions, and transportation conditions. For example, in cold regions, the thickness of the wall insulation layer needs to be increased, while in rainy regions, the roof waterproofing grade needs to be enhanced.
