Structural Diagram of Prefabricated Wood-Plastic House
Currently, there is no publicly available specific structural diagram of prefabricated wood-plastic houses, but the structural system can be explained by combining their key structural features. As a new type of prefabricated building, the structural system of prefabricated wood-plastic houses needs to take into account both the characteristics of wood-plastic materials (such as corrosion resistance, lightweight and high strength) and the functional requirements of the building. The core structure usually revolves around three major systems: the roof, walls, and floor. The following is an analysis from the perspectives of key structures and connection methods:
Roof Structure: Integrated Insulation and Waterproof Design
The roof of a wood-plastic integrated house adopts a 'composite layer + support frame' structure. The outermost layer is a wood-plastic baseboard, serving as a decorative and protective layer for the roof. Its surface can be processed into a wood-like texture, combining aesthetics with weather resistance. The middle layer is insulation cotton, typically rock wool or glass wool, which is fixed beneath the baseboard through filling or pasting methods, effectively blocking heat transfer and improving building energy efficiency. The inner layer is a waterproof layer, using polymer waterproof membranes or coatings that closely adhere to the insulation cotton to prevent rainwater infiltration. The support frame consists of U-shaped brackets and purlins. The U-shaped brackets are bolted to the purlins, forming a horizontal support surface. The wood-plastic baseboard is directly laid on the brackets for quick installation. The purlins are connected to the top of the walls, forming the load-bearing framework of the roof and ensuring structural stability.
Walls and Floor: Combination of Modularization and Lightweight Design
Although there is no direct structural diagram, the modular design logic of glued-laminated timber prefabricated houses can be referenced. The walls may adopt a 'wood-plastic panel + light steel frame' composite structure: the outer layer is a wood-plastic decorative panel, the inner layer is a fire-resistant gypsum board, and the middle is filled with insulation material (such as polystyrene board). The light steel frame serves as the support framework, connected by bolts or rivets for quick assembly. The floor may adopt a wood-plastic decking and concrete composite structure: the wood-plastic decking serves as a formwork, directly laid on steel beams. After pouring concrete, a composite floor is formed, balancing lightweight and load-bearing requirements. It should be noted that such designs require structural calculations based on specific loads (such as live loads and wind loads) to ensure safety.
Connection Nodes: Standardization and Detachability
The connection nodes of prefabricated wood-plastic houses emphasize standardization and detachability to meet the needs of industrial production. Roof-to-wall connection: This is achieved through pre-embedded metal connectors (such as angle irons and steel plates). One end of the connector is fixed to the purlins or wall frames, and the other end is bolted to the wood-plastic baseboard or panels, ensuring structural integrity. Wall-to-floor connection: This may adopt a 'slot + bolt' method, where slots are reserved at the edges of the floor, and the bottom of the walls is inserted into the slots and fixed with bolts for quick positioning and connection. Such designs facilitate later maintenance and renovation, aligning with the development trend of prefabricated buildings.
