Design of Adding Container Houses to Buildings

The design of adding container houses to buildings should integrate structural safety, functional adaptability, and sustainability. The following technical points and cases can be referred to:

1. Structural Safety and Seismic Design
Container houses need to form a stable connection with the original building structure. For example, Inner Mongolia Yiqi Company uses high-strength weathering steel (Q355B) to construct a self-balancing frame, reducing material usage by 15% through rigid connections between corner fittings and side beams. At the same time, it introduces a dual-fixing mode of 'wedge-shaped lock + high-strength bolts', controlling displacement to within 3 millimeters in an 8-degree rare earthquake, significantly better than conventional welded joints. When used for building additions, it is necessary to ensure that the connection joints match the load-bearing structure of the original building and verify the overall stability through finite element analysis.

2. Modularization and Industrial Prefabrication
The modular design of China State Construction Integrated Building divides the building into independent room modules, completing water and electricity, decoration, and soft furnishings integration in the factory. Only water and electricity connections are required on-site for occupancy. This model can shorten the construction cycle by more than 50% and supports repeated disassembly and relocation to different locations. For building additions, the floor height can be extended by superimposing steel structure roof trusses or standard container modules can be spliced to achieve seamless integration with the original building.

3. Thermal Performance Optimization
In extreme climates, a composite envelope structure should be used to improve thermal insulation performance. For example, the three-layer structure of 'rock wool - air layer - aluminized zinc plate' has a thermal conductivity of ≤0.040 W/(m·K) and a heat transfer coefficient (U-value) of <0.5 W/(m²·K), effectively reducing the risk of condensation. If the addition area is located in cold or hot regions, the thickness of the rock wool should be adjusted or reflective thermal insulation coatings should be added according to the local climate.

4. Functional Zoning and Customization
Duplex container houses support customization of size and function as needed. In the case of Guangzhou Jinge Company, a 40-foot container measuring 11.8m×6.75m, when spliced, provides a usable area of 80 square meters, with an internal layout including a living room, bedroom, and office area, equipped with facilities such as air conditioners and wardrobes. When adding to a building, additional spaces such as dining rooms, studies, or storage areas can be incorporated based on the original building's functions, or window designs can be optimized for lighting and ventilation.

5. Material Durability and Maintenance
A surface coating of 'epoxy zinc-rich primer + polyurethane topcoat' can provide a 15-year protection cycle and support a 25-year lifespan for the main structure. For the added part, it is necessary to ensure that the container materials (such as galvanized frames and color-steel sandwich panels) can withstand high temperatures (≤50℃), low temperatures (≤-50℃), wind resistance of level 9, and earthquake resistance of level 8 to adapt to extreme environments. Regular inspection of the integrity of connection joints and coatings can extend the service life.