如何裝載20呎冷凍櫃貨櫃
分步裝載指南 - 20呎冷凍櫃的溫度控制、氣流管理、重量分配及冷鏈合規
內部尺寸
5.44m × 2.29m × 2.27m
可用容積
28.1 m³
最大載重
27,400 kg
皮重
~3,080 kg
最大裝載高度
2.27m 內部高度
分步裝載指南
預冷容器並確認溫度
在裝載前至少2小時（冷凍貨物需4小時以上）啟動冷凍裝置並預冷容器至目標溫度。使用獨立溫度計驗證溫度——切勿僅依賴裝置顯示。貨物本身必須已達正確溫度才能裝載。冷藏櫃僅能維持溫度，無法有效冷卻溫暖貨物。
檢查裝置、T型地板及門封
檢查冷凍裝置是否有可見損壞，並聆聽是否有異常聲音。確認T型地板（凸起鋁柵格）完好無缺，無彎曲或缺失部分——此地板形成氣流通道以維持貨物溫度。檢查門封是否有裂縫，並確保關閉時完全壓縮。檢查排水孔是否暢通。冷藏裝置故障或T型地板損壞會導致溫度異常並造成貨物損失。
裝載時保留氣流間隙——切勿阻擋T型地板
T型地板將冷凍裝置的冷空氣引導至貨物下方，並使其向上流經貨物。切勿將貨物直接放置於容器地板上——務必使用棧板。在貨物與側牆之間至少保留5公分間隙，並在貨物頂部與天花板之間至少保留10公分空間。切勿將貨物堆疊於前牆的蒸發器風扇處。阻塞氣流會導致熱點並造成貨物腐壞。
堆疊以利冷空氣循環，而非最大密度
與乾貨櫃不同，冷藏櫃裝載時需優先考量氣流流通。將紙箱堆疊成煙囪狀或在各排之間加入墊片，以利垂直氣流循環。新鮮農產品切勿完全收縮包裝整個棧板，應保持頂部及四側部分開放以利空氣交換；冷凍貨物則可採用密集堆疊，因貨物已達所需溫度且氣流循環需求較低。
設定溫度、通風及濕度控制
將恆溫器設定為符合貨物類型的精確溫度。新鮮農產品需配置新鮮空氣交換（FAE）通風口，以便排出乙烯氣體及二氧化碳；冷凍貨物則需完全關閉 FAE。若裝置具備濕度控制功能，則依貨物需求設定。所有設定均須記錄於冷藏櫃清單並附上副本。
封箱、文件記錄並安裝溫度記錄器
在封箱前安裝已校準的溫度數據記錄器於櫃內貨物中（而非牆面），並記錄預冷溫度、裝載時貨物中心溫度及所有裝置設定。拍照記錄裝載後的貨櫃，確保氣流間隙及溫度顯示器清晰可見。封箱後確認發電機組或電源已連接。冷鏈中斷（尤其是港口儲存期間）是冷藏索賠的首要原因。
Weight distribution rules
考慮冷凍機組重量
冷凍機組位於前牆，重量約300-500公斤，會使集裝箱重心前移。因此，與乾貨集裝箱相比，應將更多貨物重量裝載於靠近門端的位置，使前後重量分配目標接近35/65，而非標準的40/60比例。
切勿超過棧板高度限制
冷凍集裝箱的內部高度低於乾貨集裝箱，原因在於T型地板（使貨物提高約6公分）及所需的天花板氣隙（最低10公分）。以20呎冷凍集裝箱為例，其內部高度為2.27公尺，實際可用貨物高度約為2.10公尺。超過此高度將阻塞回流空氣，導致局部高溫。
均勻分散T型地板上的重量
T型鋁製地板比標準木製集裝箱地板更輕，且承重能力較低（約2,200公斤/平方公尺，而乾貨集裝箱為3,000公斤/平方公尺）。因此，應將重貨分散於整個地板面積上。集中載重可能導致T型地板彎曲或斷裂，進而破壞氣流通道並使地板不平。
保持紅線區域暢通
多數冷凍集裝箱內壁標有紅線，標示最大貨物高度。貨物若超過此紅線，將阻塞從貨物頂部返回蒸發器的回流空氣路徑，這是導致溫度異常的最常見原因。務必將貨物裝載於紅線以下，即使因此犧牲少量立方容量。
Loading Patterns Library
Optimize your container space with proven loading patterns for different cargo types
Column Stack Pattern
A simple and straightforward loading pattern with boxes stacked in vertical columns. Ideal for uniform cartons with good stacking strength.
Best For
- • Uniform, rigid cartons
- • Boxes with good stacking strength
- • When load stability is a priority
Efficiency
Pro Tips
- • Ensure columns are aligned vertically to maximize weight-bearing capacity of boxes
- • For added stability, consider plastic wrapping each column or adding corner protectors
- • Leave minimal gaps between columns to prevent shifting during transport
Interlocking Pattern
An advanced loading pattern where each layer alternates orientation, creating a more stable structure. This "brick-like" arrangement distributes weight more evenly and prevents collapse.
Best For
- • Cartons with moderate stacking strength
- • Medium to long distance shipping
- • When preventing collapse is critical
Efficiency
Pro Tips
- • Alternate the orientation of each layer by 90 degrees for maximum stability
- • Ensure boxes can support this load pattern - weaker boxes may crush despite interlocking
- • Creates better resistance against shifting during transit, reducing damage risk
Pinwheel Pattern
An efficient pattern where boxes are arranged in alternating orientations within the same layer, creating a pinwheel-like appearance. This maximizes space utilization and provides excellent stability.
Best For
- • Rectangular boxes with non-square dimensions
- • When maximum space utilization is needed
- • Shipments requiring both stability and efficiency
Efficiency
Pro Tips
- • Works best when box length is roughly twice its width (2:1 ratio)
- • Can improve stability and prevent shifting compared to simple stacking
- • For heavier goods, limit stack height and consider layer separation with slip sheets
Cargo Securing Techniques
Proper cargo securing is essential for safe and damage-free transport. Learn best practices for different cargo types and conditions.
Lashing & Tie-Down Techniques
Proper cargo lashing prevents movement during transport, reducing the risk of damage and ensuring safe delivery. Container ships can experience significant forces during transit, making secure cargo essential.
Understanding Lashing Points
Standard shipping containers come equipped with built-in lashing points in the floor, walls, and ceiling. These anchor points are designed to secure cargo with straps, ropes, or chains.
- • Floor lashing points can typically handle 2,000-5,000 kg of load
- • Wall and ceiling points usually have lower capacity (1,000-1,500 kg)
- • Always check the specific lashing point capacity in your container documentation
Effective Lashing Techniques
Diagonal Lashing
Straps run diagonally from the cargo to the lashing points, creating tension that prevents movement in multiple directions.
Loop Lashing
Straps form loops around the cargo and attach to lashing points on the same side, providing lateral stability.
Cross Lashing
Straps cross over the cargo in an X pattern, providing excellent stability against both lateral and longitudinal forces.
Direct Lashing
Straps connect directly from the cargo to the nearest lashing point, offering simple but effective restraint.
Pro Tips
- • Always use lashing points on opposite sides to create balanced tension
- • Check strap tension periodically during loading to account for settling
- • Use edge protectors where straps contact cargo edges to prevent damage
- • For heavy cargo, combine multiple lashing methods for redundancy
Essential Tie-Down Equipment
Lashing Straps
- • Breaking strength: 2,500-10,000 kg
- • Available in various lengths
- • Typically made of polyester
Tensioners & Ratchets
- • Working load limit: 500-5,000 kg
- • Look for smooth ratchet operation
- • Choose appropriate size for strap
Hooks & End Fittings
- • Claw hooks for lashing points
- • J-hooks for various attachments
- • Safety latches prevent disengagement