Load Optimization Lab exists to answer one question at a time: given this truck and this cargo, how do you actually pack it — safely, densely, and in the right order for the road? Pick a truck and route, list what's going on it, and watch a deterministic packing engine build a real 3D load plan you can inspect, rotate, and adjust by hand.
How the bench works
Every step below follows the same layout: inputs on the left, the load plan on the right. The packer is a transparent, explainable heuristic — not a black-box solver — so every placement (and every item it couldn't place) comes with a reason.
The five-step process, left to right
Each step must be reviewed before its output is trustworthy enough to feed the next one.
What this engine simplifies, on purpose
Two deliberate simplifications, stated up front rather than hidden: irregular items (furniture, machinery, anything not a clean box) are packed as their tightest bounding cuboid — every real-world load-planning tool does this, and the 3D view marks them with a hatched texture so the approximation is visible, not hidden. Rotation is limited to the vertical axis (swapping length and width) — items are assumed to stay right-side up unless orientation is explicitly unlocked. Front/rear weight balance is advisory guidance, not a certified axle-weight compliance check.
Pick the vehicle you're dispatching and the stops on this route. Stop order drives loading order: the furthest stop loads first (toward the nose), the first stop loads last (nearest the doors) — so unloading naturally goes in delivery order without digging through the truck.
Vehicle
Delivery stops
Stop 1 is the first delivery. Add more stops for a multi-drop route — each cargo item is assigned to one in the Manifest step.
| Seq | Stop name |
|---|
Truck schematic
A rotatable 3D preview — same rendering as the Load Plan step — of the standard spec for this model, cab/hood and wheels included, sized relative to the rest of the fleet so a van and a 53’ trailer read at their true relative scale. This always reflects the model's stock dimensions, even if you've customized the fields on the left.
Truck at a glance
Dimensions above are approximate interior figures for planning — always confirm against the specific vehicle before a real dispatch. Driving range is a typical full-tank estimate for this vehicle class, not a spec for your exact unit.
One row per SKU, with a quantity. Fragility and stacking rules are what keep the packer from putting a pallet on top of your glassware — set them here, not in your head.
Manifest
| Name | Stop | Qty | L | W | H | Wt/ea | Fragility | Stackable | Max stack wt | Orient. locked | Irregular | Priority |
|---|
Field notes
Fragility sets how much of an item's footprint must rest on solid support beneath it — Sturdy 50%, Fragile 75%, Very Fragile 100%.
Stackable controls whether other items may be placed on top of this one at all. Uncheck it for anything nothing should ever rest on.
Max stack weight caps the total weight one unit of this item can carry on top of it. Leave blank for no limit (only relevant if Stackable is checked).
Irregular items are packed as their tightest bounding box and shown with a hatched texture in the 3D view — a labeled approximation, not a true irregular shape.
Drag to orbit, scroll to zoom. Turn on Move mode to drag boxes by hand — drops that break a rule (collision, insufficient support, over a stack-weight limit) spring back with a reason.
Floor plan by layer
A read-only top-down picking plan for each height layer — front of truck at top, doors at bottom.
Selected item
Click a box in the 3D view to inspect it.
Load sequence
| # | Item | Stop |
|---|
How dense is this load, how much of the payload budget is left, and is the weight sitting evenly over the axle — or all pushed toward one end?
Utilization
Front / rear weight balance
Advisory only — a simple center-of-mass split by which half of the truck's length each item's center falls in. Not a certified axle-weight compliance check.
Unplaced items
| Item | Stop | Units unplaced | Reason |
|---|
Step 5 of 5 — take this run with you: export the full data behind it, or generate a print-ready PDF report of the truck, manifest, load plan, and utilization.
Data export / import
Exports the truck, route, manifest, and current load plan as a JSON file. Import restores a previous run — from this lab or a backup.
PDF report
Opens a print-ready summary in a new tab — truck & route, cargo manifest, a snapshot of the 3D load plan, per-layer floor plans, and utilization & balance. Use your browser's print dialog (destination: Save as PDF) to keep a copy.
Reset
Clears all saved data for your account and reloads with the sample truck and manifest.
Something confusing, wrong, or missing? Tell us — every report shapes what gets built next. Your report is kept with your work in this browser; sign in before submitting if you want it to reach the team.