Durian is a climacteric fruit, continuing to metabolize after harvest and remaining highly sensitive to temperature, humidity, and mechanical vibration. Poorly designed internal racking inside a durian transport container can cause localized temperature deviations, airflow short-circuiting, and cargo displacement, all of which accelerate fruit deterioration. The industry has developed a set of technical standards governing the racking design of such containers, covering material selection, tier spacing, airflow path planning, and cargo securing methods. These standards have been distilled from a large body of transport data, and offer practical guidance for reducing cargo loss rates.

Racking is typically built from 304 stainless steel or galvanized steel sheet. Stainless steel resists corrosion, holds up in humid environments without rusting, and is well suited to reefer applications. Galvanized steel offers lower cost with adequate strength, and is suitable for standard containers. Shelf panels are 1.5 to 2 mm thick — anything thinner falls short on load-bearing capacity, and since each durian carton carries non-trivial weight, deformation occurs when stacking is heavy. Columns are best fabricated from 50×50 mm square tubing, spaced no more than 600 mm apart, with each tier supporting a load of more than 200 kg. Anti-slip strips along the side panels keep cartons from sliding once placed. Durian transport containers carry considerably higher racking load requirements than general-purpose containers.

Tier spacing calls for careful calibration. Standard durian packing cartons measure 300 to 350 mm in height, making 400 mm tier spacing the right choice — leaving enough clearance for cold air to circulate. The internal temperature of a durian transport container is held between 13 and 15 degrees Celsius, and racking that is packed too densely impedes airflow circulation, causing temperatures in the lower tiers to run high, accelerating respiration, and leading to husk browning. Air baffles are installed between tiers to guide airflow upward from below, ensuring each carton of durian is reached by cold air. On the humidity side, drip pans are laid along the base of the racking to prevent condensation from dripping onto the fruit.

Securing devices cannot be omitted. Ocean transport carries heavy pitching motions, and unsecured durian cartons sway within the container, causing collisions and mechanical damage. L-shaped channels are fitted on both sides of the racking, into which the cartons slot precisely, restraining movement front, back, left, and right. Rubber edging along the shelf panels reduces friction. Elastic securing straps at the base reinforce the load, keeping cartons in place when the vehicle hits speed bumps or takes sharp turns. The door position also deserves attention — the door opening should not face directly onto the main aisle of the racking, to avoid airflow blowing directly onto the fruit. Spending a bit more on the securing design of a durian transport container yields meaningful reductions in arrival loss.

Racking design for durian transport containers spans materials, structure, airflow, and securing — multiple dimensions in total. Each link has a standard to follow, and when those standards are observed, loss rates can be controlled within the 3% to 5% range. When customizing, confirm the racking design with the manufacturer, so that every durian arrives safely at destination.

CIMC Qingdao Refrigeration Industrial Base, established in 1999, is dedicated to the design and manufacture of ISO standard reefer containers as well as the production and customization of a wide range of refrigerated and insulated specialty products, serving customers across major logistics systems throughout North America, Europe, Asia, Australia, and beyond. The base's products cover application scenarios across the "sea, land, and air" supply chain systems, providing full-process equipment manufacturing solutions for cold chain equipment — from pre-cooling at production origins and manufacturing to midstream logistics transportation and last-mile warehousing. For more information about durian transport containers, we warmly welcome your inquiry.

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