How to Dismantle Container House Corners

The dismantling of container house corners requires careful operation based on the structural type and connection method. The core steps include confirming the structural type, releasing connections and fixtures, cutting and separating, and ensuring safety during the process.

1. Confirm Structural Type and Connection Method
Container house corners are typically composed of corner fittings (standard ISO corner fittings or custom-made non-standard corner fittings). The connection methods fall into two categories:

• Welded Structure: Corner fittings are fixed to the main beams and columns through welding, commonly found in fully welded or light steel frame container houses. For such structures, cutting tools are required to break the welds.

• Bolt/Plug-in Structure: Corner fittings are connected to the frame via bolts or plug-in components, often seen in modular combined houses (such as K-type light steel combined houses). For these structures, the fixed bolts or plug-in components must be removed first.

  2. Release Connections and Fixtures

• Welded Corners:

  • Use an angle grinder or plasma cutter to cut along the welds, taking care to control the cutting depth to avoid damaging the main beam steel (such as Q235B or welded weather-resistant steel).
  • If the corner involves multi-layer stacking force transmission (such as in vertically stacked container structures), check if the lower-layer corner fittings are securely locked to ensure structural stability during cutting.

• Bolt/Plug-in Corners:

  • Use a wrench or power tool to remove the fixed bolts, retaining them for potential reuse (if structural integrity needs to be preserved).
  • Gently tap to separate plug-in corner fittings, avoiding violent disassembly that could cause deformation.

  3. Cutting, Separation, and Safety Handling

• Post-cutting Treatment:

  • After cutting, use sandpaper or an angle grinder to smooth any burrs to prevent scratches.
  • If the corner has undergone anti-corrosion treatment (such as overall galvanization or spraying), apply anti-corrosion paint to the cut surface to extend its service life.

• Safety Precautions:

  • Wear protective goggles, gloves, and a dust mask during operation to avoid injury from sparks or metal debris.
  • If the corner is connected to enclosing structures such as walls or roofs, remove the surrounding panels first before handling the corner fittings to prevent collateral damage.

  4. Special Scenario Handling

• Corners in Multi-story/Combined Houses:

  • In vertically stacked container structures, dismantle the corners from top to bottom layer by layer to ensure the load-bearing safety of the lower structures.
  • In horizontally combined or staggered container houses, corners may involve lateral force-resisting components, requiring reinforcement of the surrounding structures before dismantling.

• Old Container Renovation Scenarios:

  • If the container is a certified inspection-qualified unit (according to GB/T12418 standards), check the integrity of the corner fittings before dismantling to avoid difficulties due to rust or deformation.
  • After dismantling the corner fittings from old containers, it is recommended to retain intact corner fittings for use in other projects to reduce material waste.