How to Dismantle Container Houses

The dismantling of container houses requires a systematic process that combines safety regulations with principles of resource utilization. The specific steps are as follows:

I. Preliminary Preparation and Safety Assessment

1. On-site Survey and Drawing Verification
   It is necessary to verify the original construction drawings, clarify the steel structure framework, connection nodes, and load distribution, and assess the feasibility of dismantling. For example, Qingdao Xinwanda Container Technology Co., Ltd. designates a work warning area before dismantling and equips it with anti-fall nets and rigid isolation belts to prevent the risk of falling objects from heights.

2. Load Rechecking and Structural Stability Inspection
   For multi-story container houses (such as the second-floor dismantling case at the Tianjin Beitang construction site), it is essential to focus on inspecting the load-bearing capacity of the framework to avoid overall collapse due to local dismantling. If the house has been in long-term use or shows signs of corrosion, key nodes should be reinforced in advance.

II. Step-by-Step Dismantling Process

1. Removal of the Top Enclosure System
   Manual tools (such as wrenches and screwdrivers) should be used in conjunction with light lifting equipment to remove roof skylights, insulation cotton, and color steel plates in sequence. High-altitude throwing is strictly prohibited. Materials should be lowered slowly using ropes or baskets to prevent damage or injury. For example, the Shandong movable plank house dismantling regulations explicitly require the classification and packaging of roof materials for subsequent recycling.

2. Dismantling of the Framework Structure
   Connection nodes should be cut in the reverse order of “columns-beams-supports-floor slabs”:

   • First, separate the fixed bolts or welding points between the columns and the foundation;
   • Then, remove the connectors between the beams and columns to release residual stress;
   • Finally, dismantle the floor slabs (such as cement fiber boards or steel-wood composite floors).
     Direct violent demolition is prohibited. Cutting equipment should be used to precisely separate components to avoid damaging the reusability of the steel.

3. Removal of Doors, Windows, and Ancillary Facilities
   Doors, windows, electrical systems, and water supply and drainage pipelines should be removed separately. Their positions should be marked, and hardware fittings should be properly stored for subsequent reinstallation or second-hand trading.

III. Component Classification and Resource Utilization

1. Material Sorting
   Steel, aluminum alloy profiles, and door and window hardware should be classified and packaged, and then connected to recycling warehouses or local disposal sites. For example, the steel structure framework of container houses can be remelted and recast into new steel, while the rock wool or polyurethane in sandwich panels can be recovered for the production of insulation materials.

2. Compliant Transportation and Environmental Protection Treatment
   During transportation, dust covers should be used to prevent dust pollution. If hazardous substances (such as lead batteries or Freon refrigerants) are present, they should be handled by professional agencies in compliance with national temporary building safety management regulations.

IV. Precautions for Special Scenarios

• Multi-story container houses: Dismantling should proceed from top to bottom, with stairs and corridors being removed simultaneously to prevent imbalance and collapse.
• Special-purpose houses such as quarantine isolation houses: Thorough disinfection should be carried out before dismantling, and waste should be disposed of according to medical waste standards.
• Export-type container houses: If cross-border dismantling is involved, the building waste management regulations of the target country should be confirmed in advance to avoid penalties for non-compliance.

Through a systematic dismantling process, container houses can achieve a material recovery rate of over 90%, reducing dismantling costs and aligning with green building concepts.