How to Compare Container House: Key Criteria

The key criteria for comparing container houses should be comprehensively evaluated from three aspects: usage scenarios, basic conditions, and special considerations for second-hand units:

I. Clarify Usage Scenarios and Usage Cycles Different scenarios have significantly different requirements for the specifications and performance of container houses. Scenarios such as temporary accommodation and construction site dormitories require prioritizing portability, rapid assembly and disassembly capabilities, and short-term costs; cultural tourism and commercial spaces need to focus on aesthetic design and long-term durability. The usage cycle directly affects procurement or leasing decisions: short-term mobile projects are suitable for leasing to reduce idle costs, while long-term fixed projects are more economical to purchase. Additionally, it is necessary to clarify delivery time milestones to avoid project delays due to production cycle issues.

II. Verify Basic Conditions

1. Specifications and Area: Confirm whether the container is a standard size (e.g., 20 feet, 40 feet) or a custom specification, as well as the net area of a single container and the layout rationality after multiple containers are joined. Excessive gaps between joined containers or chaotic layouts can reduce space utilization and affect the user experience.
2. Structural and Safety Indicators: Focus on verifying wind, snow, and earthquake resistance ratings, as well as floor load-bearing capacity. These parameters must match the climatic conditions and number of floors in the installation area. For example, coastal areas require enhanced wind resistance design, while high-rise installations require increased floor load-bearing standards.
3. Materials and Fire Rating: Materials must comply with national fire safety regulations, especially in crowded places, where fire inspection reports are required. Some low-cost materials may pose flammability risks and require strict screening.
4. Delivery and Installation Methods: Require suppliers to provide a written delivery plan that clearly outlines transportation routes, lifting equipment, and installation procedures to avoid ambiguous responsibilities resulting from verbal commitments.

III. Special Considerations for Second-Hand Container Houses

1. Structural Integrity: Focus on inspecting the welding quality and corrosion level of load-bearing core components such as corner fittings, bottom rails, and side panels. Severe corrosion or welding defects can render the container unable to withstand stacking or lifting, posing safety hazards.
2. Grade Assessment: Classify grades based on usage years and damage levels (e.g., 'cargo-worthy', 'refurbishable'), as refurbishment costs vary significantly across grades. For example, procedures such as floor replacement and rust removal and painting can add thousands of yuan in costs.
3. Clear Property Rights: Confirm that the container has no mortgages, is not overdue for return, or is not under customs supervision to avoid legal risks. This can be done by checking registration information or requiring the supplier to provide property rights documentation.
4. Key Parameter Verification:
   • Dimensions and Volume: Measure the internal length, width, and height, and check for floor sagging or damaged interior linings, as these factors directly affect usable space.
   • Load Capacity and Tare Weight: Verify the CSC safety compliance plate and nameplate data, and inspect bottom rail repair marks. Load capacity depends on the original strength of the bottom rail, and repaired bottom rails may reduce load-bearing standards.
   • Structural Condition: Check side panel flatness, roof leak repair marks, door frame deformation, and corner fitting integrity. The bottom cross member and threshold are vulnerable parts during forklift operations and require focused inspection. If necessary, request a waterproof test.