Container House Connection Methods
The connection methods for container houses mainly include three types: welding, bolt connection, and hybrid connection. The specific choice depends on factors such as structural design requirements, installation efficiency, and long-term usage stability.
1. Welding Connection
Welding achieves a permanent connection by melting metal at high temperatures, offering high structural strength and good integrity. For example, the container mobile homes from Suzhou Zhongnan Steel Structure Co., Ltd. use a fully steel structural frame, ensuring weld strength meets the GB/T 19001-2016 standard through automatic welding processes. In 12-level strong wind conditions, the maximum deformation of the frame is only 2mm, well below the national standard limit. This connection method is suitable for scenarios requiring extremely high structural stability. However, it requires strict process control for welding quality, and repair can be difficult if local damage occurs after long-term use and turnover.
2. Bolt Connection
Bolt connection uses high-strength bolts to fix container corner fittings or frame nodes, offering the advantages of easy installation and strong disassemblability. Products from CIMC Modular Building Investment Co., Ltd. adopt a semi-welded, semi-bolted connection structure. During on-site assembly, hexagon socket bolts connect the container corners to the bottom beams, and the bolts are tightened after leveling to ensure the diagonal difference of the bottom frame is ≤3mm. This connection method facilitates rapid assembly and disassembly and reuse, but bolts may loosen over time due to vibration or stress concentration, requiring regular inspection and maintenance.
3. Hybrid Connection
Hybrid connection combines the advantages of welding and bolt connection, using welding in key load-bearing areas to ensure strength and bolts in non-core areas to improve installation efficiency. For example, in some container buildings, the main frame is fixed by welding during container splicing, while secondary beams and floors are connected using self-tapping screws or drill tail screws. Additionally, in multi-container combination designs, containers may be connected as a whole through corner fitting bolts, while local nodes are reinforced with welding to balance structural stability and construction convenience.
The choice of connection method requires comprehensive consideration of project requirements: For long-term wind and earthquake resistance, a fully welded structure is superior; for frequent assembly and disassembly or movement, bolt connection is more suitable; hybrid connection is ideal for scenarios requiring both high structural strength and installation efficiency.
