What to Pad Under Container Houses

The foundational materials placed under container houses should be selected based on the usage scenario, container type, and ground conditions. Common options include concrete foundations, pre-fabricated pads, or steel plates, with the primary goal of providing uniform load-bearing and preventing settlement.

1. Long-term Fixed Use Scenario: Concrete Strip Foundation

For container houses requiring long-term fixed use, pouring a concrete strip foundation is the preferred solution. Specific requirements are as follows:

• Dimensions: The foundation width is recommended to be between 30 cm and 50 cm, with the depth determined by the local frost depth (e.g., in cold regions, it should extend below the frost line) to ensure foundation stability.
• Construction Points: The top surface of the foundation must be kept level, with a height difference not exceeding 5 mm, to prevent door and window deformation or wall cracks due to uneven stress on the container.
• Applicable Scenarios: Suitable for long-term use scenarios such as construction site dormitories and fixed office spaces, effectively distributing the container's load to the ground.

2. Short-term or Temporary Use Scenario: Pre-fabricated Pads or Steel Plates

For container houses used temporarily or requiring frequent relocation, pre-fabricated concrete pads or steel plates are more flexible and efficient. Specific requirements are as follows:

• Pad Spacing: The spacing between pads should not exceed 2 meters to ensure uniform stress on the container's bottom frame.
• Leveling Treatment: A crushed stone leveling layer should be laid beneath each pad to ensure all stress points are on the same horizontal plane, preventing local suspension.
• Material Selection:
  • Pre-fabricated Concrete Pads: Lower cost, suitable for general temporary scenarios.
  • Steel Plates: Stronger load-bearing capacity, suitable for heavy equipment or high-frequency relocation scenarios.
• Applicable Scenarios: Scenarios requiring rapid setup and short usage periods, such as exhibitions and temporary construction site offices.

3. Special Scenario: Direct Placement on Hardened Ground

If the ground is already hardened (e.g., concrete ground) and meets flatness requirements, container houses can be placed directly without additional foundations. However, attention should be paid to the following details:

• Ground Conditions: The ground must be free of cracks and unevenness; otherwise, repairs should be made in advance.
• Drainage Treatment: It is recommended to install drainage ditches to prevent water accumulation, which could lead to container rust or internal moisture damage.
• Applicable Scenarios: Scenarios with high timeliness requirements, such as urban temporary shops and emergency relief housing.