How to Lift Container Houses

Lifting container houses requires strict adherence to standardized procedures to ensure safety and stability. The specific operations are as follows:

Preparation

1. Inspect the Structure of the Container House
   Conduct a comprehensive inspection of key areas such as the four corners of the box and welds to confirm there is no damage, deformation, or looseness. If structural defects (such as weld cracks or box distortion) are found, they must be repaired or reinforced first to prevent breakage or collapse during lifting.

2. Determine Lifting Point Locations
   Standard container houses usually have dedicated lifting lugs or hooks at the four corners, which can be used directly. For modified non-standard boxes or those without dedicated lifting points, the lifting point locations need to be calculated based on weight distribution. For example, long boxes require additional lifting points in the middle to prevent bending due to uneven force during lifting.

3. Select Appropriate Lifting Equipment
   Choose lifting equipment with sufficient capacity (such as a 25-ton crane) based on the weight of the container house (e.g., 10-20 tons), and ensure that the working radius and lifting height of the equipment meet the requirements of the lifting site. Forklifts are only suitable for light-duty or short-distance moving scenarios.

Lifting Process

1. Connect Lifting Slings
   When using steel wire ropes or lifting straps, ensure they are firmly connected to the lifting points to avoid eccentric loading. The included angle of the steel wire ropes should be controlled within 90 degrees to prevent local stress from being too high and causing breakage. For example, when lifting with two lifting points, the lifting slings should be symmetrically distributed.

2. Slowly Lift and Test Stop
   After starting the equipment, slowly lift the container house to a height of 0.5-1 meters, then pause to check if the lifting slings are securely connected and if the box is balanced. If tilting or abnormal noises are detected, lower it immediately for adjustment, eliminate potential hazards, and then continue lifting.

3. Horizontal Movement and Precise Positioning
   When moving horizontally along the predetermined route, keep the equipment running smoothly and avoid sudden acceleration or deceleration. When using a crane, the operator needs to coordinate the lifting, slewing, and luffing actions to ensure the box does not shake. For example, communicate in real-time through wireless intercoms for adjustment.

4. Slowly Lower and Place
   As the target position is approached, control the lowering speed (0.5-1 meters per minute) to avoid collision between the box and the foundation. For high-rise lifting, use guiding devices to assist with positioning.

Post-Lifting Inspection

1. Fixing and Connection
   After placement, immediately fix the box to the foundation using bolts, welding, etc., and check if the connection areas are tight to prevent displacement during use.

2. Lifting Slings Maintenance
   After lifting is completed, inspect the steel wire ropes and lifting straps for signs of wear or breakage, and promptly replace damaged components to ensure safety for the next use.

Additional Note: Container terminals often use the "four-point lifting" method (lifting the top with lifting devices). This method complies with the recommended standards of the International Organization for Standardization and has advantages such as high efficiency, strong safety, and precise positioning, making it suitable for large-scale loading and unloading scenarios.