Structural Design of Container Houses
The structural design of container houses is based on the modular characteristics of standard containers, achieving spatial functionality through modification, reinforcement, and combination. The core aspects include structural modification and reinforcement, modular and standardized design, structural safety assurance, and spatial planning and layout.
1. Structural Modification and Reinforcement
Container houses use standard containers (commonly 20-foot and 40-foot) as the base structure. Windows and doors are created by cutting the side or end walls of the container. After cutting, steel beam frames are added around the openings to reinforce the structure, distribute stress, and prevent deformation. When combining multiple containers, the connection method directly affects overall stability: side-by-side, stacked, or staggered combinations require rigid connections using specialized corner fittings and high-strength bolts, with internal welding further enhancing integrity. For multi-story stacking, the top of the lower container needs additional reinforcement (such as adding crossbeams or thickening the steel plate) to bear the load of the upper containers and avoid local crushing.
2. Modular and Standardized Design
Container houses follow modular principles, with each container serving as an independent unit that can quickly expand space through horizontal or vertical stacking, similar to a “building block” model. Standardized dimensions (such as a 20-foot container measuring 6 meters long, 2.4 meters wide, and 2.6 meters high) facilitate factory prefabrication of components (such as window and door frames, partition systems), which can be assembled on-site with bolts or welding, significantly shortening construction time and reducing on-site complexity. Additionally, modular design supports flexible adjustment of functional zones, such as adapting to different scale requirements by adding or removing containers.
3. Structural Robustness and Safety
Originally designed for maritime transport, container steel frames (with tensile strengths of 400-500 MPa) offer high strength. When modified for construction, professional reinforcement (such as adding diagonal braces or welding reinforcement plates) significantly enhances wind resistance (typically up to wind scale 12 or higher) and earthquake resistance (capable of withstanding an earthquake intensity of 7 degrees). For multi-story stacking, proper load distribution (such as the lower containers bearing the self-weight and live loads of the upper ones) and strengthening connection nodes ensure the structural safety of multi-story buildings, even meeting commercial or residential building code requirements.
4. Spatial Planning and Layout
Single-container spaces are limited and typically adopt an open layout, dividing functional areas such as living, dining, and sleeping through movable furniture or lightweight partitions. When combining multiple containers, they can be allocated by function (such as living containers, bathroom containers) and connected via internal corridors or external walkways. Vertical space utilization is crucial: adding mezzanine floors (such as steel structures with wooden panels) can increase usable area by 50%-80%, with the lower mezzanine often used for storage or installing fixed facilities (such as kitchen cabinets). Additionally, leveraging the height advantage of containers, high-ceiling spaces or loft structures can be designed to enhance spatial hierarchy.
