Design of Refrigerated Container Buildings

The design of refrigerated container buildings requires comprehensive planning in terms of structure, insulation, electrical systems, and functional adaptability to ensure safety and practicality.

1. Structural and Foundation Treatment

1. Structural Inspection and Reinforcement: Thoroughly inspect the integrity of the container frame (corner fittings, bottom frame) to eliminate risks of rust or deformation. When creating openings (for doors, windows, vents), reinforce the surrounding area with channel steel or I-beams to avoid compromising the overall load-bearing structure. The scope of openings on the side and top panels of 40-foot refrigerated containers must be strictly controlled to prevent affecting load-bearing capacity.
2. Foundation Laying: The ground must be poured with a concrete foundation of strength C20 or higher (thickness ≥ 150mm), and anchor bolts must be embedded to connect with the container's corner fittings, preventing settlement or displacement. If the foundation soil is soft, the foundation area must be expanded or pile foundations must be used for reinforcement.

2. Insulation and Waterproofing Treatment

1. Interior Lining Insulation Upgrade: The original container insulation layer must be supplemented with rock wool boards (density ≥ 120kg/m³, thickness 50mm) or extruded polystyrene boards (XPS, thickness 80mm), and covered with a moisture-proof vapor barrier (e.g., ≥ 0.2mm polyethylene film) to prevent moisture intrusion and insulation failure.
2. Waterproof Sealing Enhancement: All openings, joints, door seams, and window frames must be sealed with silicone structural adhesive; cold bridge areas (such as door frames and vents) must be filled with expanding polyurethane (PU foam) to ensure no leakage risks.

3. Electrical and Refrigeration System Modification

1. Electrical Wiring Standards: Wiring must comply with the "Civil Building Electrical Design Code," using metal wire trays or flame-retardant PVC conduits to protect the wiring, with sufficient sockets and lighting points reserved. If the original refrigeration system is to be retained, a separate 380V three-phase power line must be installed, along with a leakage protection circuit breaker.
2. Ventilation Design: Install quiet axial fans (air volume ≥ 150m³/h, noise ≤ 40dB) with rain-proof louvers to prevent carbon dioxide buildup. The use of gas stoves or open flames for heating inside the container is strictly prohibited to prevent carbon monoxide poisoning and fire hazards.

4. Application Scenarios and Design Optimization

Functionally divide the space according to needs (e.g., restrooms, showers, simple kitchens) to optimize space utilization. For example, temporary living scenarios can include foldable furniture; commercial stores require enhanced lighting and display functions. The design must consider modularity and scalability for easy future modification or relocation.