Fixed Container House

A fixed container house is a modular building form that uses containers as its basic structure and is modified for permanent residence or office use at fixed locations. Its core features, technical advantages, and typical application scenarios are as follows:

1. Structural Design and Material Innovation

Fixed container houses use high-strength steel as the main frame, such as Q355B weathering steel, which has a 30% higher yield strength than ordinary carbon steel and can form a self-balancing system. For example, a company in Yiqi uses rigid connections between corner fittings and side beams to maintain stability in single containers with a length-to-width ratio of 2:1, reducing material usage by about 15%. The enclosure structure adopts a three-layer composite construction of 'rock wool-air layer-aluminum-zinc coated steel plate'. The rock wool layer is 75-100 millimeters thick with a thermal conductivity below 0.040 W/(m·K). Combined with a 5-millimeter air layer, the overall heat transfer coefficient (U-value) is below 0.5 W/(m²·K), effectively reducing the risk of condensation in Inner Mongolia during winter and extending the lifespan of the steel structure.

2. Seismic Resistance and Connection Technology

For areas with a seismic design intensity of 7 degrees, fixed container houses adopt a dual-fixing mode of 'wedge-shaped locks + high-strength bolts'. The wedge-shaped locks are made of 45# steel through heat treatment, with a slope angle of 15 degrees, which can produce a self-locking effect under horizontal shear forces. Shaking table tests show that the displacement of this joint is controlled within 3 millimeters under simulated 8-degree rare earthquakes, which is about 40% better than the deformation amplitude of conventional welded joints, and supports secondary disassembly and assembly, reducing construction waste.

3. Corrosion Protection and Lifecycle

The coating system uses a combination of 'epoxy zinc-rich primer + polyurethane topcoat'. The primer contains over 80% zinc powder, protecting the base metal through the sacrificial anode principle; the topcoat is added with nano-silica particles, with a hardness of 3H, resisting wind and sand erosion. Salt spray tests (ASTM B117 standard) show that this coating system does not show 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.

4. Application Scenarios and Advantages

Fixed container houses are widely used in temporary office, accommodation, event support, and other scenarios. Their modular design supports factory prefabrication and high on-site assembly efficiency. For example, a company in Suzhou can install a single quick-assembly container in just 2 hours, with a 100-set camp landing cycle of 7 days. Compared to traditional buildings, container houses reduce construction waste emissions by about 90%, with higher resource utilization, aligning with the trend of green building development.