How to Lift Container Houses

Lifting container houses requires strict adherence to standardized procedures to ensure safety and operational accuracy. The specific steps are as follows:

Preparation

1. Inspect the Container House Structure
   Conduct a comprehensive inspection of the container's integrity, focusing on the corners, welds, and other areas for damage, deformation, or looseness. If issues are found, repair or reinforce them first, such as performing weld repairs on cracked welds to ensure structural stability.

2. Determine Lifting Point Locations
   Standard container houses typically have dedicated lifting lugs or hooks at the four corners, which can be used directly. If the container has been modified or lacks dedicated lifting points, calculate and add lifting points based on its dimensions and weight. For example, extra-long container houses may require additional lifting points in the middle to prevent deformation during lifting.

3. Select Appropriate Lifting Equipment
   Choose lifting equipment with a capacity that matches the weight of the container house (e.g., a 25-ton crane for a 10-20 ton container). Also, consider whether the equipment's working radius and lifting height meet on-site requirements, such as selecting a crane with an adjustable boom length for narrow spaces.

Lifting Process

1. Connect Lifting Slings
   When using steel wire ropes or lifting straps, ensure they are securely connected to the lifting points to avoid uneven loading. For example, the included angle between steel wire ropes should be ≤90° to prevent excessive local stress and potential breakage.

2. Slowly Lift and Inspect
   After starting the equipment, lift the container house to a height of 0.5-1 meter, then pause to inspect whether the lifting slings are securely connected and whether the container is balanced. If tilting or abnormal noises are detected, lower it immediately for adjustment.

3. Control Horizontal Movement
   When moving along the predetermined route, maintain stable operation of the equipment to avoid swaying or sudden acceleration/deceleration. For example, crane operation should coordinate lifting, slewing, and luffing actions to prevent the container from colliding with surrounding objects.

4. Precisely Lower and Place
   After reaching the target location, lower the container house slowly at a speed of 0.5-1 meters per minute to avoid violent collisions with the foundation. For example, reinforce soft soil foundations in advance to prevent settlement.

Post-Lifting Inspection

1. Inspect Fixing and Connections
   After placing the container in position, secure it to the foundation using bolts or welding, and check whether the connection points are tight to prevent displacement during use.

2. Maintain Lifting Slings
   After lifting is complete, inspect the steel wire ropes or lifting straps for wear or breakage. If issues are found, replace them promptly to ensure safety for the next use.

In addition, common lifting methods for containers include top-lifting with lifting gear (four-point lifting) and bottom-corner lifting with slings. Among them, top-lifting with lifting gear is recommended by the International Organization for Standardization (ISO) for its high efficiency, strong safety, and precise alignment, making it suitable for specialized dock scenarios.