Container House Material Production

The production of container house materials mainly involves steel, enclosure panels, connectors, and other auxiliary materials. The selection and process of these materials directly affect the safety, durability, and functionality of the house.

1. Steel Selection and Structural Framework

The core structure of container houses uses high-strength steel, such as Q355B weather-resistant steel, which has a yield strength approximately 30% higher than that of ordinary carbon steel, supporting a self-balancing system with a length-to-width ratio close to 2:1. The framework is welded from channel steel, angle steel, and edge beams, with the top longitudinal corrugated panels dispersing stress through their geometric shape, avoiding local buckling and reducing material usage by about 15%. For example, Yiqi Company uses 6mm thick square steel as columns, combined with reinforcing ribs, increasing the overall compressive strength by about 50% when stacked two layers high, meeting the seismic fortification intensity requirements of magnitude 7.

2. Enclosure Panels and Thermal Performance

The enclosure structure must balance insulation, heat resistance, and moisture resistance. A common configuration is a three-layer composite structure of "rock wool-air layer-aluminum-zinc coated steel plate":

• Rock wool layer: With a thickness of 75-100mm, the fibers are arranged perpendicular to the heat flow direction, with a thermal conductivity below 0.040 W/(m·K);
• Air layer: A 5mm closed cavity inhibits convective heat transfer, with an overall heat transfer coefficient (U-value) below 0.5 W/(m²·K), reducing the risk of condensation in winter in Inner Mongolia;
• Coating process: The outer layer uses a high weather-resistant polyester resin coating, while the inner layer adds a moisture-resistant aluminum foil layer, effectively controlling condensation when the diurnal temperature difference exceeds 20℃.

3. Connection Nodes and Seismic Design

Connectors must meet the requirements of being detachable and seismic-resistant. For example:

• Wedge-shaped lock: Made of 45# steel through heat treatment, with a 15-degree inclined surface design that self-locks under horizontal shear forces, controlling displacement to within 3mm during a simulated magnitude 8 earthquake;
• High-strength bolts: Form a double fixation with the lock, optimizing deformation amplitude by 40% compared to welded joints;
• Sealing process: The door frame has a bending angle accuracy of ±0.5 degrees, combined with EPDM rubber sealing strips, with a weather resistance exceeding 5 years, providing significant anti-seepage performance in sandy weather.

4. Auxiliary Materials and Functional Expansion

• Aluminum alloy doors and windows: Lightweight and corrosion-resistant, with better insulation performance than ordinary steel;
• Plastic pipelines: Quick-connect designs pre-embedded in the chassis reduce on-site slotting errors;
• Flooring materials: Cement fiberboard or steel-wood composite flooring, balancing load-bearing and moisture resistance requirements.

Material selection should be based on climate, geological conditions, and usage scenarios. For example, in cold regions, the density of rock wool should be increased; in earthquake-prone areas, node connections should be strengthened; and for temporary housing, processes can be simplified to reduce costs.