Large Prefabricated Housing Components

Large prefabricated housing components mainly include two categories: modular building components and composite slabs.

Modular Building Components: The core of modular construction lies in breaking down the entire building into multiple independent modules. These modules are manufactured in a factory and then transported to the construction site for assembly. The manufacturing process is similar to that in the automotive industry, where individual parts are produced separately and then assembled on a final assembly line. Specifically, key parts such as ceilings, walls, and waterproof layers in bathrooms are all prefabricated in the factory, ensuring construction quality and efficiency. Taking a public housing project in Shenzhen, Guangdong, as an example, five residential buildings nearly 100 meters tall in the project were assembled from 6,028 concrete modules. Among them, a two-bedroom unit of 70 square meters can be completed by joining just two and a half modules, fully demonstrating the efficiency and flexibility of modular construction.

Composite Slabs: Composite slabs are formed by combining prefabricated slabs with cast-in-place reinforced concrete layers, making them particularly suitable for high-rise buildings and large-span structures. Their common span ranges from 4 to 6 meters, meeting the needs of different building structures. The prefabricated slabs in composite slabs serve a dual function as structural components and permanent formwork, while the cast-in-place layer can accommodate piping and be filled with expanded polystyrene boards to form a box-shaped cross-section, reducing self-weight and improving sound insulation. This structure combines prestressed thin slabs with a cast-in-place layer, with the surface of the thin slabs treated with roller indentations to enhance bonding with the cast-in-place layer. The thickness of the cast-in-place layer is determined based on the span and is typically not less than 90mm to ensure the overall stability and load-bearing capacity of the slab. The application of composite slabs not only improves construction efficiency but also ensures building quality, making them an indispensable component in modern construction.