Steel Content in Container Houses
The steel consumption of a standard 20-foot container house is approximately 1.2 tons. The following provides an introduction from the perspectives of steel types, structural optimization, and anti-corrosion treatment:
Steel Types and Structural Composition
Container houses use steel as their core structural material, primarily including channel steel, angle steel, steel plates, and hot-dip galvanized cold-formed steel sections. The main frame is welded from high-strength steel sections (such as H-beams and C-beams), forming key load-bearing components like beams, columns, and purlins. For example, adding C-beam purlins between the bottom beams can distribute loads, allowing the container to remain structurally stable even when stacked three layers high. While wall panels often use rock wool, glass wool, or polyurethane sandwich panels, the steel framework remains the main support.
Structural Optimization and Load-Bearing Design
Traditional container bottom frames have large spacing between longitudinal beams, which can lead to insufficient floor stiffness when used as living spaces. To address this, companies enhance local load-bearing capacity by adding auxiliary steel components (such as C-beam purlins and light steel keels) while optimizing the layout of the steel framework to balance mechanical properties. For instance, the quick-assembly container products from Suzhou Zhongnan Steel Structure Co., Ltd. feature a fully steel structural frame with a wind resistance rating of Level 12 and an earthquake resistance rating that meets national standards. The thickness of the steel and welding process directly affect its load-bearing capacity.
Anti-Corrosion Treatment and Durability
The corrosion resistance of steel is a key factor determining the service life of container houses. Common anti-corrosion processes include:
- Shot blasting followed by protective paint coating: A combination of zinc-rich primer and polyurethane topcoat can maintain the steel's effective lifespan for over 15 years in environments with wind, sand, and temperature variations, such as in northwest China;
- Overall galvanizing treatment: A dense oxide layer is formed through hot-dip galvanizing to slow down the corrosion rate;
- Light steel structure anti-corrosion: Using Q235 material and applying epoxy zinc-rich primer and topcoat ensures the durability of the framework.
Steel Recycling and Environmental Value
The core advantage of container houses lies in the full lifecycle recycling of materials. Compared to one-time poured concrete temporary buildings of the same area, container houses produce only one-third of the carbon emissions and have a disassembly damage rate controlled within 5%. The steel can be recycled 100%.
