SmartPacker U3
Upright Unit-Load Planning

What U3 Helps Answer

SmartPacker U3 builds container loading plans for cartons and palletized unit loads. It computes a plan from cargo and container dimensions, then lets you edit it interactively when the actual loading job needs adjustment.

Use U3 when the shipment contains multiple cargo types and the units must stay upright. It also covers weight-capacity checks, fill-rate reporting, and Excel export for sharing or printing.

Data Setup

The package includes sample data in data/u3/data.xlsx. The unit-load sheet holds cargo specifications and quantities; the container sheet holds the loading-space specifications. Edit these sheets in Microsoft Excel to replace the sample data with your own.

The trial package ships with common container types and sample cargo parameters, including standard and non-standard pallet dimensions. If those defaults do not match your situation, edit data.xlsx before starting the software, or edit the cargo parameters from the user interface.

Load by Algorithm

Start with the quantity panel. Move the mouse over a quantity box and roll the mouse wheel to increase or decrease a cargo quantity. The loading plan updates as quantities change.

Green indicators mean the current cargo quantity can still be increased. Red indicators mean the software cannot find a feasible way to add more of that cargo under the current plan and constraints. The summary on the right shows cubic fill rate, loaded weight, and weight fill rate.

Manual Editing

The 2D view supports interactive editing when you need to adjust a generated plan or verify one built by other means. Select a pile to delete, move, rotate, or relocate it. Green move and rotation buttons indicate feasible moves; orange buttons remain available for cases where a move would conflict and you plan to clean up the result later.

You can also clear quantities and start a new pile from a container corner, edit the units inside a selected pile, copy a pile, or place units across the level top of adjacent piles when their heights match.

Customize the Case

Container data can be customized by container type, weight limit, and co-load settings when part of the container is already occupied. Co-load settings describe the length already taken, any usable recess in the occupied space, the side position, and the remaining weight capacity.

Cargo parameters can be edited in data.xlsx or directly in the software. Blue fields are editable; gray fields are locked. Mouse-wheel editing is convenient but easy to trigger by accident—turn off edit mode once you finish.

Questions and comments: zhzx@zhihuo.com.