The logic behind container loading: pallets ensure safety, the number of layers determines load capacity, and space determines freight charges — by carefully considering ‘which container to use and which route to take’, you can save on freight costs.
First, work out how to load the container. The key objectives of container loading are: to load it fully (to save on freight costs), to prevent damage (to ensure quality), and to ensure items can be easily accounted for (to facilitate stock-taking); First distinguish between ‘loose cartons’ (small items) and ‘palletised loading’ (large items) before finalising the plan — loose packing saves space, whilst palletisation ensures safety.
How is space calculated? Container loading (20-foot / 40-foot containers): arrange according to the external dimensions of the cartons (length, width, height), leaving gaps for handling; draw up a ‘loading plan’ (layout diagram) before loading. Space utilisation should be guided by the principle of ‘loading to capacity whilst ensuring easy unloading’.
How should the number of layers be determined? Number of layers (stacking of cartons): The number of layers is determined by the cartons’ compressive strength (edge compression test); the bottom layer (which bears the weight) must be reinforced; ‘Do not exceed height’ (layer limit) markings must be printed. The number of layers should be confirmed based on the criterion that ‘the bottom layer does not collapse’.
How should pallets be arranged? Pallets (wooden/cardboard): number of stacking layers (maximum load capacity), forklift access (leave gaps); “pallet height” (height limit) must be verified against container door specifications. The arrangement of pallets should be based on the principle of “stable stacking and easy forklift access”.
Moisture protection and securing? Moisture protection for container loading (desiccants, pallet underlays); securing (strapping, air bags); a warning stating “Inspect on arrival” (for deformation or moisture damage) must be printed. Details regarding moisture protection should be tailored to the climate of the shipping route.
Container loading is the ‘last mile’ of international trade packaging: no matter how well the boxes are made, if the container is not fully loaded or the goods become deformed during transit, all the previous effort will have been in vain — the loading arrangement directly determines freight costs and the quality of the goods upon arrival. This article clearly explains the organisation of container loading; clients preparing packaging for export should refer to it as required.
