Container House and Color-Steel House
Both container houses and color-steel houses are modular buildings, but they differ in material structure, application scenarios, and performance. The following analysis is conducted from three aspects: design principles, material applications, and functional characteristics.
1. Design Principles and Structural Stability
Container houses are modeled after freight containers, using high-strength weather-resistant steel (such as Q355B grade) as the main frame, forming a self-balancing system through rigid connections between corner fittings and side beams. For example, the container body manufactured by Baotou Xinxing Color Plate Steel Structure Co., Ltd., with a length-to-width ratio close to 2:1, can still disperse stress through the top longitudinal corrugated plate, reducing material usage by 15%. Its modular design supports three-story stacking, and the addition of C-shaped steel purlins between the bottom beams can evenly distribute loads, ensuring structural stability.
Color-steel houses, on the other hand, are supported by light steel keels, with walls constructed from color-coated steel plates (galvanized steel plate + polystyrene/rock wool sandwich). For instance, the K-type houses produced by Suzhou Keliwei Integrated Housing Co., Ltd. combine C-shaped steel purlins with color-coated steel plates to form a detachable lightweight structure, but their load-bearing capacity is weaker than that of container houses, typically used for single-story temporary buildings.
2. Material Applications and Thermal Performance
The metal container body of container houses has a high thermal conductivity coefficient, necessitating multi-layer construction to improve thermal performance. For example, Hohhot Residential Container House Company adopts a three-layer structure of “0.6mm galvanized outer layer + 80-100mm rock wool insulation layer + PVC-coated steel inner layer,” reducing indoor temperature fluctuations by 40% compared to traditional color-steel houses. Some companies also add an elevated layer at the bottom of the container body to block ground cold bridge conduction.
The thermal performance of color-steel houses depends on the sandwich material. Polystyrene sandwich panels are cost-effective but have poor fire resistance, while rock wool sandwich panels can achieve an A-grade fire rating but have a higher thermal conductivity coefficient. For example, the export packing container houses produced by Shandong Zhongchang Integrated Housing Co., Ltd. use rock wool color-coated steel plates, increasing the thickness of the insulation layer to enhance heat insulation, but still requiring auxiliary heating equipment in winter.
3. Functional Characteristics and Application Scenarios
Container houses are characterized by standardization and strong mobility, supporting rapid hoisting and joint treatment, with construction errors compressible to the millimeter level. Their fully prefabricated mode is suitable for scenarios such as urban temporary residences and camp dormitories, and the steel can be recycled throughout its life cycle, with carbon emissions only 43% of those of concrete temporary houses.
Color-steel houses, on the other hand, excel in cost-effectiveness and flexible assembly, widely used for construction site dormitories and warehousing. For example, the simple color-steel houses produced by Wujiang Jiayu Color Steel Plate Activity House Factory can be installed within 48 hours using bolt connections, but their service life typically does not exceed 10 years, and their wind and sand resistance is weaker than that of container houses.
