House Container Chassis Structure Diagram

The structure of a house container chassis mainly consists of the base frame structure, floor materials, corner fittings, forklift pockets, and welding connection design, as detailed below:

Base Frame Structure

The base frame is the core load-bearing framework of the chassis, composed of base beams (bottom side rails and end beams), cross beams (bottom cross members), and corner post connection plates.

• Base Beams: Located on both sides and at the front and rear ends of the container, they are welded from high-strength steel (such as Q345) to provide longitudinal and transverse support, ensuring overall structural stability.
• Cross Beams: Welded horizontally between the bottom side rails, typically spaced 300-400mm apart (about 7-8 beams for a 20-foot container), they enhance chassis rigidity through dense distribution and disperse the load from cargo or building modules.
• Corner Post Connection Plates: Located at the four bottom corners, connecting the corner fittings to the columns, they are welded from thickened steel plates to prevent deformation due to localized stress concentration during stacking.

Floor Materials

The floor must balance load-bearing capacity and durability, with common materials including:

• Multi-layer Plywood: With a thickness of 18-28mm and a moisture-proof film on the surface, it is suitable for dry environments and can bear loads up to 2 tons/m² (as required for a standard 20-foot container).
• Steel Corrugated Plate: With a thickness of 2-3mm, it enhances rigidity through its corrugated structure and is highly corrosion-resistant, often used in humid or heavy-load scenarios.

Corner Fittings (Corner Castings)

Located at the eight corners of the container, they are made of cast steel and comply with ISO standards (such as ISO 1161). Each corner fitting is equipped with twist-lock interfaces for lifting, stacking (up to 6-8 layers high), and securing to transport vehicles. The interior of the corner fittings has reserved holes for installing guide plates or connectors.

Forklift Pockets

Some chassis are equipped with forklift pockets on both long sides, with positions and dimensions complying with ISO 1496 standards (such as pocket width of 205mm and depth of 100mm), facilitating forklift insertion for handling. The pocket bodies are reinforced with stiffeners to prevent local deformation.

Welding and Connection Design

The main beams and cross beams of the chassis are connected using fully automatic gas metal arc welding, with weld grades required to meet or exceed ISO 5817 Class B. Key areas (such as corner post connections) are reinforced with triangular gusset plates to enhance torsional resistance. Some design drawings (such as those from the Xizang Yongcheng Foldable Container House Factory collection) also show details of drainage slopes (typically 1%-2%) and moisture-proof coatings (such as epoxy zinc-rich primer) to extend service life.

Functional Summary: The chassis structure achieves a balance of load-bearing capacity, stability, and corrosion resistance by optimizing material distribution and connection methods, while meeting standardized requirements for lifting, stacking, and transportation. For specific drawings, refer to the design collections of professional manufacturers.