Rock Wool Color Steel Plate Container House
The rock wool color steel plate container house is a lightweight building unit constructed using a galvanized steel frame and rock wool sandwich panels as core materials, through prefabricated integration and modular connection methods. It features efficient thermal insulation, earthquake resistance, disassembly capability, and strong adaptability.
Material and Structural Characteristics
The container house typically combines a galvanized steel frame with rock wool sandwich panels. Some products, such as those from Baotou Xinxing Color Plate Steel Structure Manufacturing Co., Ltd., integrate walls, roofs, and floors into rigid units through full prefabrication, requiring only lifting and joint treatment for on-site installation, with construction errors minimized to the millimeter level. The enclosure structure often adopts a three-layer composite construction of 'rock wool-air layer-aluminum-zinc coated plate' (Yiqi Company), with a rock wool layer thickness of 75-100 mm. The fibers are arranged perpendicular to the heat flow direction, with a thermal conductivity of ≤0.040 W/(m·K). Combined with a 5 mm closed air layer to suppress convective heat transfer, the overall heat transfer coefficient (U-value) is <0.5 W/(m²·K), effectively reducing condensation risks and extending the lifespan of the steel structure. Another sandwich construction of 'double-sided steel plate + intermediate core' (Tuyouqi construction site color plate house) features an outer steel plate thickness of 0.3-0.5 mm, surface-treated with a polyester resin coating to reflect solar radiation heat. The intermediate core layer can be either rock wool (Class A non-combustible, melting point >1000°C) or polyurethane foam (closed-cell rate ≥95%, thermal conductivity as low as 0.022 W/(m·K)), balancing fire resistance and thermal insulation needs.
Connection Methods and Seismic Performance
Yiqi Company employs a dual fixation mode of 'wedge-shaped lock + high-strength bolts'. The wedge-shaped lock, made of heat-treated 45# steel with a 15-degree inclined surface angle, generates a self-locking effect under horizontal shear forces. Shaking table tests simulating rare 8-degree earthquakes show a joint displacement of ≤3 mm, outperforming conventional welded joints by approximately 40% in deformation amplitude, and the disassemblable design facilitates secondary relocation and repeated assembly. The Tuyouqi construction site color plate house fixes columns to ground beams using bolts, lock pieces, U-shaped channels, and expansion bolts. Wall panel joints are embedded with rubber sealing strips and secured with self-tapping screws, while the roof panel adopts a 'self-locking' interlocking structure for continuous load-bearing and waterproof ridges.
Thermal Performance Optimization and Price Range
To address the high thermal conductivity issue of metal containers, companies in Hohhot generally adopt a three-layer construction: an outer 0.6 mm thick galvanized plate for wind and sand resistance, an intermediate 80-100 mm thick rock wool layer as the main thermal insulation, and an inner PVC-coated steel plate to reduce thermal radiation. Some incorporate elevated layers to block ground cold bridge conduction, reducing indoor temperature fluctuations by approximately 40% compared to traditional color plate houses. In terms of pricing, foreign trade packing container houses cost around 260 yuan, simple prefabricated folding container houses cost about 798 yuan, and cross-border export residential container houses cost approximately 290 yuan, with prices varying based on specifications and configurations.
