Structural Material Performance Indicators of Container Houses

The structural material performance indicators of container houses cover the main frame, enclosure structure, floor, and other structural-related materials, as detailed below:

1. Main Frame Materials The main frame typically uses weathering steel, with a yield strength requirement of 235MPa to 345MPa or higher, commonly available in grades Q235B or Q345B. Among them, Q345B high-strength steel has a yield strength approximately 50% higher than Q235 steel, making it suitable for scenarios requiring higher load-bearing capacity. The thickness of the frame steel should be ≥1.6mm (referencing ISO 630 standard), with column thicknesses in conventional residential container houses typically ranging from 3 to 5 millimeters. The material must possess good welding performance and toughness to withstand stresses during lifting, transportation, and stacking. Corrosion protection is crucial; frames used outdoors for extended periods should be treated with hot-dip galvanizing (coating thickness ≥85μm, corrosion resistance for 15-20 years) or a coating system of zinc-rich primer + polyurethane topcoat. The dense zinc layer formed by hot-dip galvanizing provides rust protection for over 10 years, while ordinary paint can only last 3-5 years.

2. Enclosure Structure Materials Walls and roofs commonly use color-coated steel sheets (color steel sheets), with the thickness of the base sheet directly affecting wind pressure and impact resistance. For exterior walls and roofs, a recommended thickness is 0.5mm-0.8mm, while side and roof panel steel thickness should be no less than 1.2mm. The coating material for color steel sheets should be selected based on the environment: polyvinylidene fluoride (PVDF) coatings offer the best weather resistance, suitable for highly corrosive or high-UV areas; polyester (PE) coatings provide good cost-effectiveness for general environments. Additionally, wall panels can also be made of glass fiber reinforced cement boards (GRC boards) or metal embossed panels to enhance fire resistance and aesthetic appeal.

3. Floor Materials The floor must withstand concentrated loads, so its thickness should be ≥28mm, commonly using composite wood boards or steel plates. Composite wood boards must have sufficient compressive strength, while steel plates require anti-rust treatment to ensure long-term stability.

4. Performance of Other Structural-Related Materials Corner fittings are key components for stacking containers, with each corner fitting requiring a tensile strength of ≥25 tons (ISO 1161 standard) to ensure stacking safety. When connecting multiple container bodies, high-strength bolts of grade 8.8 or above should be used to prevent deformation due to thermal expansion and contraction. The bolts must possess high tensile strength and fatigue resistance to maintain long-term structural stability.