Container Mobile House Baotou

The container mobile houses in Baotou are centered around innovative design and practical performance, integrating steel selection, enclosure structures, connection nodes, and anti-corrosion technology to form a modular building system that meets the climatic and engineering needs of Inner Mongolia.

1. Steel Selection and Structural Optimization
The main frame of container houses in Baotou uses high-strength weathering steel (such as Q355B grade), with a yield strength approximately 30% higher than that of ordinary carbon steel. A self-balancing system is formed through rigid connections between corner fittings and side beams, allowing stable support even when the length-to-width ratio of a single container approaches 2:1, without the need for external reinforcement. The longitudinal corrugated plates on the top disperse stress through corrugated geometry, reducing the risk of local buckling and decreasing material usage by about 15%. For example, the 3*6 container house manufactured by Baotou Xinxing Color Plate Steel Structure Co., Ltd. uses national standard Q235 galvanized square tubes for its main frame, with a wall thickness of no less than 1.5 millimeters, providing a service life of over 15 years after anti-corrosion treatment.

2. Thermal Performance of Enclosure Structures
The enclosure system adopts a three-layer composite structure of “rock wool-air layer-aluminum-zinc coated steel plate”. The rock wool layer, with a thickness of 75-100 millimeters, has fibers arranged perpendicular to the heat flow direction, with a thermal conductivity below 0.040 W/(m·K); the 5-millimeter air layer in the middle suppresses convective heat transfer, resulting in an overall heat transfer coefficient (U-value) below 0.5 W/(m²·K). This design reduces the risk of condensation in the low-temperature winter environment of Inner Mongolia, extending the service life of the steel structure. For example, the wall and roof panels of Xinxing container houses at construction sites in Inner Mongolia use double-layer colored profiled steel sheets filled with 50-100 millimeters of rock wool or polyurethane, providing significant thermal insulation.

3. Connection Nodes and Seismic Design
For the seismic fortification intensity of 7 degrees in Inner Mongolia, the container connections adopt a dual-fixing mode of “wedge lock + high-strength bolts”. The wedge lock, made of 45# steel through heat treatment, has a bevel angle of 15 degrees, producing a self-locking effect under horizontal shear forces. Shaking table tests show that the displacement of this node is controlled within 3 millimeters during simulated 8-degree rare earthquakes, with a deformation amplitude about 40% better than that of conventional welded nodes. The detachable design facilitates secondary relocation and repeated assembly, reducing construction waste.

4. Surface Anti-Corrosion and Lifecycle
The coating system uses a combination of “epoxy zinc-rich primer + polyurethane topcoat”. The primer contains over 80% zinc powder, protecting the substrate through the sacrificial anode principle; the topcoat, with added nano-silica particles, has a hardness of 3H, resisting wind and sand erosion. Salt spray tests (ASTM B117 standard) show no red rust after 1000 hours, equivalent to a 15-year protection cycle in coastal or industrial pollution environments, supporting a 25-year service life for the main structure of the container.