Container House Wall Construction

Container house wall construction primarily employs a steel structural frame combined with prefabricated wall panels. The core materials include hot-dip galvanized cold-formed steel sections and rock wool/polyurethane sandwich panels, enabling rapid assembly and functional adaptation through modular design.

1. Wall Structure Framework

The wall framework of container houses typically uses hot-dip galvanized cold-formed steel sections. This material is shaped through cold-forming processes, and its surface galvanization provides effective rust and corrosion resistance. The framework inherits the standardized design of freight containers, using 20-foot or 40-foot containers as basic units, connected via welding or bolts to form an integrated load-bearing system. For example, the quick-assembly container products from Suzhou Zhongnan Steel Structure Co., Ltd. feature a fully steel structural frame, achieving a wind resistance rating of Level 12 and an earthquake resistance rating compliant with the GB50011-2010 standard, thanks to the framework's triangular stability structure and reinforced node design.

2. Wall Panel Materials and Performance

The filling materials of the walls directly affect the house's thermal insulation, sound insulation, and fire resistance. Common solutions include:

• Rock Wool Sandwich Panels: Made from basalt as the raw material, melted and blown into fibers with a binder added, these panels achieve a Class A fire rating with a fire endurance exceeding 2 hours, while also offering excellent sound absorption properties.
• Polyurethane Sandwich Panels: Their closed-cell structure results in a thermal conductivity as low as 0.024W/(m·K), providing better thermal insulation than traditional brick walls. With a low density (approximately 40kg/m³), they reduce the house's self-weight.
• Glass Wool Sandwich Panels: Produced by melting raw materials like silica dioxide and then fiberizing them, these panels are commonly used in scenarios with high fire resistance requirements, such as commercial temporary spaces.

3. Modular Assembly Method

The connection between the walls and the framework adopts a standardized node design. For instance, wall panels are fixed to C-shaped steel studs using self-tapping screws, or hidden clips are used for rapid assembly and disassembly. This design allows container houses to be assembled and disassembled more than 15 times (as seen in products from Suzhou Zhongnan) without significant loss of structural stability after each disassembly. During on-site assembly, workers simply hoist the prefabricated wall panels to the designated positions on the framework and secure them with bolts or rivets to complete the enclosure, with the assembly time for a single module controlled within 4 hours.

4. Functional Expansion Design

Based on usage scenario requirements, walls can integrate various functional components:

• Door and Window Systems: Standard-sized openings are pre-reserved to support the installation of thermal-break aluminum alloy windows or fire doors. For example, a Danish individual's container residence features large floor-to-ceiling windows to introduce natural light.
• Pipeline Embedding: Electrical wiring and water pipes are embedded during the wall panel production stage to avoid on-site trenching that could damage the structure, as commonly done by container house wholesalers who embed PVC conduits within the walls.
• Decorative Layers: The exterior facade can be sprayed with fluorocarbon paint or fitted with metal cladding panels, while the interior walls are covered with calcium silicate boards or wood veneers to enhance aesthetics, as seen in the curved wall customization in a Shanghai commercial district pop-up shop project.