How to Replace the Floor of a Container House

Replacing the floor of a container house requires selecting the appropriate method based on the floor material (such as wooden flooring, fiber cement board, or patterned aluminum plate). The core steps include assessing the extent of damage, removing the old floor, installing the new floor, and finishing touches.

1. Assessing the Extent of Damage

First, inspect the degree of damage to the floor. If there are only local cracks, deformations, or wear, a local replacement can be carried out. If the damaged area is large (such as exceeding 30% of the total floor area) or there are structural issues (such as deformation or corrosion of the bottom beams), an overall replacement or reinforcement of the container structure may be necessary. For example, wooden floors can be visually inspected for cracks and holes, or tapped with a hard object to determine if they are hollow; fiber cement boards need to be checked for warping or delamination; patterned aluminum plates require confirmation of whether the anti-slip patterns are severely worn.

2. Removing the Old Floor

Select removal tools based on the material:

• Wooden Floor: Use a floor pry bar to lift from the edge and gradually remove the damaged sections, avoiding damage to the surrounding floor.
• Fiber Cement Board: Use an electric drill to remove the fixing screws or燕尾丝 (a type of screw, translated as 'dovetail screws' here for reference, but may need a more precise term based on context). If the board is tightly adhered to the bottom beam, a angle grinder can be used to cut it apart.
• Patterned Aluminum Plate: First remove the surrounding welds or bolts, then use a suction cup or pry bar to assist in separation.
  Note: After removal, clean up debris at the bottom of the container (such as nails and glue residue) to ensure the surface of the bottom beam is flat.

3. Installing the New Floor

1. Material Matching: The new floor must match the original material and specifications. For example, wooden floors should be of the same tree species and thickness; fiber cement boards should confirm the compressive strength (such as being pressed by a 7000-ton press); patterned aluminum plates should match the anti-slip patterns (such as five-rib or orange peel patterns).
2. Fixing Method:
   • Wooden Floor: Fix with self-tapping screws or floor adhesive, leaving an expansion joint (about 2-5mm) at the joints.
   • Fiber Cement Board: Snap a chalk line along the centerline of the π-shaped secondary beam and fix with cross-head dovetail screws, spacing the nails 300-350mm apart.
   • Patterned Aluminum Plate: Fix with welding or bolts to ensure a firm connection with the bottom beam.
3. Moisture-Proof Treatment: Wooden floors require laying a moisture-proof membrane on the bottom beam; fiber cement boards require brushing with PVC special floor adhesive to enhance waterproofing.

4. Finishing Touches

1. Surface Treatment: Wooden floors need to be sanded to remove burrs and painted with a color matching the original; fiber cement boards need to fill the joints; patterned aluminum plates need to clean the anti-slip patterns.
2. Load-Bearing Test: Use a standard load (such as a forklift) to verify the floor's compressive capacity, ensuring it meets the ISO1496 standard (a 20-foot container must withstand a uniformly distributed load of 14,000kg).
3. Safety Inspection: Confirm that there is no corrosion or desoldering at the connection between the floor and the container, and that the bottom crossbeams are not deformed or corroded.