What is the Structure of a Container House

Container houses use a steel frame as their core structure, supplemented by modular design, and are formed into a whole through welding or bolt connections, possessing characteristics of high strength, wind and earthquake resistance, and flexible combination.

I. Core Structure: Steel Frame System

The basic structure of container houses adopts high-strength steel, which is made into standardized components through cold-forming processes. Typical structures include:

1. Frame System: Composed of columns, bottom beams, and top beams to form the main load-bearing structure. The wall thickness of the steel is usually 1.5-3 millimeters, and some products enhance local stiffness by adding C-shaped steel purlins. For example, a Baotou enterprise maintains structural stability even when three layers are stacked by adding purlins between the bottom beams.
2. Connection Methods: There are two types: welding and bolt connections. Welding offers strong integrity and excellent deformation resistance, suitable for frequent lifting scenarios. Bolt connections facilitate disassembly and assembly but require regular inspection of node tightness. Enterprises such as Suzhou Zhongnan use automatic welding processes, with weld strength meeting the GB/T 19001-2016 standard.
3. Corrosion Protection: A composite protective system of shot blasting for rust removal followed by spraying zinc-rich primer and polyurethane topcoat is used, which can maintain effectiveness for over 15 years in windy and sandy environments in northwest China.

II. Modular Design Features

1. Combination Flexibility: Standard container units can be spliced horizontally or vertically to form multi-story buildings, with corner fittings connection technology ensuring overall stability. A two-story container residence designed by architects in Southern California, USA, has passed national certified building code verification.
2. Functional Integration: Walls are pre-reserved with water and electricity pipeline interfaces, and the interior can integrate insulation systems, ventilation layers, and decorative finishes. Products from Yunnan Hongfeng Enterprise form a multi-layer protective system by filling with rock wool or polyurethane, achieving thermal performance in extreme climates.
3. Structural Optimization Design: Mechanical modifications are made according to residential needs. For example, the Apple Pod adopts a curved appearance to reduce wind resistance, and a broken-bridge lining structure reduces thermal bridge effects, lowering the heat exchange efficiency between the inside and outside of the container by about 40%.

III. Safety Performance Verification

Third-party actual measurement data shows that compliant products have significant disaster resistance capabilities:

• The packing container from Suzhou Zhongnan has a frame deformation rate of only 0.18% under a Level 12 typhoon and an earthquake resistance rating of Level 8.
• The standard container from CIMC can withstand a Level 11 wind with a deformation rate of 0.27%.
• Non-standard products generally have a deformation rate exceeding 1.2%, posing a risk of wall cracking.

This structural system combines the robustness of transport containers with the functionality of architectural design, enabling container houses to demonstrate unique advantages in temporary buildings, cultural and tourism accommodations, emergency shelters, and other fields.