Stack code
The stack code limits the total stacking layers when different cargo types are stacked together: set the same stack code and maximum stacking layers for different cargo items, and the software treats them as the same type when computing the maximum stacking layers.
For example: require that cargo 1 and cargo 2, whether stacked with themselves or with each other, do not exceed 4 layers.
If you only set the maximum stacking layers of cargo 1 and cargo 2 to 4, the effect is that cargo 1's self-stack ≤ 4 and cargo 2's self-stack ≤ 4, but they can still stack against each other, exceeding 4 in total — because layers are computed per cargo type. As shown:
You then need to set a stack code:
On the Cargo interface or in the import template, give cargo 1 and cargo 2 the same stack code (number, letter or Chinese character — as long as it matches) and set the maximum stacking layers of both to 4.
On the Loading rules interface, set the maximum-stacking-layers calculation method to "Cargo with the same stack code is treated as one type when computing stacking layers".
The resulting loading plan: cargo 1 and cargo 2 never exceed 4 layers in any combination.
