Baoshan Container House Production
The production of container houses in Baoshan needs to combine standardized processes with local needs. The core processes include design, production, transportation, installation, and acceptance, with a focus on material selection, structural safety, and climate adaptability.
I. Design Phase: Demand-Oriented and Structural Optimization The design of container houses should determine the functional layout based on usage scenarios (such as construction site dormitories, office areas, and commercial buildings). For example, packing-box structures can be used for multi-story stacking, or light steel frame houses can meet personalized needs for homestays. The design should comply with the "Steel Structure Design Standard" (GB50017), with a focus on calculating wind loads (which are significant in some areas of Yunnan) and snow loads to ensure structural safety. For instance, Kunming Huanyun Residential Container Factory uses hot-dip galvanized cold-formed steel frames paired with fire-resistant polyurethane sandwich panels, balancing strength and fire resistance.
II. Production Phase: Standardized Processes and Quality Control The production process includes steel cutting, welding, surface treatment (such as anti-rust spraying), wall panel composite processing (filled with rock wool or glass wool), and pre-embedding of water and electricity pipelines. Key processes should comply with the "Technical Specification for Container Houses" (JGJ/T 469-2019). For example, welding joints should undergo ultrasonic flaw detection, and wall panels should have a fire rating of Class A (non-combustible). Yunnan Wangjia Construction Engineering Co., Ltd. has built a 3,000-square-meter production workshop to achieve full process autonomy, avoiding price markups by intermediaries. Additionally, considering the strong UV radiation and concentrated rainy seasons in the Yunnan Plateau, they have optimized waterproof sealing processes, such as using double-layer silicone weather-resistant sealant for joint sealing.
III. Transportation and Installation: Modular Design and On-Site Efficiency Container houses adopt a modular design, allowing a single container to be transported by a 17.5-meter truck in quantities of 12, reducing transportation costs. On-site installation should follow the "Technical Standard for Temporary Structures in Building Construction" (JGJ/T 189-2009). For example, four workers can complete the installation of a single container in three hours, or the entire container can be directly hoisted and placed for use. Before installation, foundation layout should be carried out to ensure the vertical alignment of the centerlines of the upper and lower channels, and the purlin model should be checked (it is recommended to be no less than C120×50×20×2.0) to enhance wind resistance.
IV. Acceptance and Maintenance: Functional Testing and Long-Term Adaptability Acceptance should include checks on door and window operation, electrical safety (such as grounding resistance ≤ 4Ω), and waterproof performance (24-hour water spray test with no leakage). Considering the climate in Yunnan, regular inspections of lightning protection devices (required when the thickness of the roofing iron sheet is ≥ 0.6mm) and fire prevention measures (such as keeping electric welding operations away from sandwich panel walls) are necessary. For example, Kunming Linqiang Portable Houses recommends inspecting the tightness of the self-drilling screws fixing the angle steel every six months to prevent a decrease in wind resistance due to vibration.
