Loading workflow

Mixed cargo container loading: plan several carton sizes together

Build a mixed-SKU loading plan with dimensions, quantities, gross weights and stacking rules. Check unplaced cargo and understand the current model’s limits.

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For mixed cargo, enter each carton type separately in order mode with its own dimensions, quantity, gross weight and handling rules. Review the placed and unplaced units for every type. A combined CBM total cannot show whether different shapes can share the remaining floor space.

Prepare one row for each distinct cargo type

Separate cartons whenever their size, weight, permitted rotation or stacking limit differs. Two products with the same catalogue name may need separate rows if their packaging changes. Conversely, do not hide distinct shapes inside an average carton size: that creates a load which does not exist.

Use gross packed weight and outside dimensions. For a loaded pallet, use the complete pallet envelope and weight; set a single layer if it must not be stacked. Keep any required handling access and securing space in mind when choosing usable dimensions.

  • Packed length, width and height in centimetres.
  • Requested whole-unit quantity and gross kilograms per unit.
  • Permitted rotation: fixed, horizontal or all orientations.
  • Maximum layers and any explicit maximum stack height.

Check the order totals before searching for a layout

Consider 120 cartons of type A at 60 × 40 × 25 cm and 12 kg, plus 80 of type B at 40 × 30 × 40 cm and 10 kg. The order contains 200 cartons, 11.04 m³ and 2,240 kg. These totals help spot entry mistakes, but they do not certify that all cartons fit.

A small total volume can still conceal a single oversized unit or a restrictive stacking rule. Correct the input first; increasing the container size will not fix a mistaken unit or an impossible orientation requirement.

TypeQuantityCBM eachTotal CBMGross weight
A: 60 × 40 × 25 cm1200.0607.201,440 kg
B: 40 × 30 × 40 cm800.0483.84800 kg
Order200—11.042,240 kg

Read the result by cargo type, not just by total count

The current solver divides floor space and builds vertical stacks containing one SKU each. It does not put one SKU on top of another, even when a short stack appears to leave useful space. That deliberate limitation makes some mixed arrangements unavailable to this version.

Compare the requested, loaded and remaining quantities for each type. A plan that loads more small cartons can still leave out a commercially important large item. The tool does not understand order value, delivery priority or unloading-stop order, so review those needs yourself.

Improve a plan without changing the real shipment

Try permitted horizontal rotation, compare quantity-first and balance-first strategies, or compare another container while keeping the order unchanged. Change one assumption at a time and retain the exported input settings, so you can explain why the result changed. Do not increase the stacking limit merely to improve the visual fill.

The 3D playback is an inspection aid, not a validated loading sequence. Packaging strength, restraint, doorway passage, forklift movement and transport limits need separate review. Use the CTU Code as packing guidance and coordinate the actual operation with the responsible packing and transport teams.

  • Check each unplaced cargo type.
  • Keep fragile or upright-only handling rules intact.
  • Reserve room for securing materials and practical access.
  • Save the project JSON and share a printable result with its assumptions.

Open the load planner

Use your actual carton dimensions, weight and stacking rules to turn this example into a checked layout.

Start planning

FAQ

Can different SKUs be stacked on top of each other?

Not in the current model. Each vertical stack contains one cargo type, so space above a short stack is not reused by another type.

Can the software choose the best container for an order?

You can compare presets using the same order. The current tool does not automatically optimize a fleet of containers or include freight prices.

Sources and equipment references

  1. IMO / ILO / UNECE — CTU Code
  2. Hapag-Lloyd — 20 standard
  3. Hapag-Lloyd — 40 standard
  4. Hapag-Lloyd — 40 standard high cube