Light, bulky freight — furniture kits, foam, empty packaging, seasonal décor, oversized retail displays — usually hits cube before payload. The booking question becomes: 40GP or 40HC? The high cube adds roughly a foot of internal height and about 9–10 m³ of theoretical volume versus a standard forty. That is not free. HC equipment can cost more, be scarcer on some strings, and still fail if your SKU does not clear the door aperture or stack rules.
As of August 28, 2026, use this decision tree for planning — then verify against the actual equipment profile on your sailing. Specs below are typical ISO family ranges, not a micrometer guarantee.
Quick specs (typical dry vans)
| Spec | 40GP (standard) | 40HC (high cube) |
|---|---|---|
| Internal height (approx.) | ~2.39 m / 7′10″ | ~2.69 m / 8′10″ |
| Theoretical internal volume | ~67–68 m³ | ~76–77 m³ |
| Door opening height | Often slightly below internal height | Check HC door — not always full HC height |
| Payload | Similar order of magnitude; check CSC / VGM | Same — weight rarely the limiter for light bulky |
For a deeper HC dimension walkthrough, see our 40ft high cube guide.
Decision tree
1. Is the cargo cube-bound (fills volume before weight)?
| Answer | Next |
|---|---|
| Yes — payload headroom remains | Continue — HC is a candidate |
| No — you hit weight or axle first | Prefer GP or mixed equipment; HC height does not buy payload |
2. Do cartons / pallets need the extra ~30 cm of height?
| Answer | Next |
|---|---|
| Yes — one more tier or taller unit fits only in HC | Strong HC case |
| No — GP already clears stack height | Stay on GP unless HC is cheaper or more available |
3. Does the door opening clear the tallest piece?
Door height is often tighter than internal height. Measure the unit (on pallet, with packaging) against the door aperture, not the ceiling.
| Answer | Next |
|---|---|
| Fails door | Redesign packaging / tip rules — or different equipment |
| Clears door | Continue |
4. Will HC availability / rate erase the cube gain?
At peak Transpacific prints, one fewer box can offset a modest HC premium. Model both:
| Scenario | Boxes needed | Illustrative all-in / box | Total ocean |
|---|---|---|---|
| 40GP @ 85% useful cube | 3 | $6,800 | $20,400 |
| 40HC @ same SKUs | 2 | $7,200 | $14,400 |
If HC saves a sailing, it usually wins — even with a premium. If both need the same box count, pick the cheaper / more reliable equipment.
5. Do port / inland limits care about HC?
Some rail / warehouse doors, warehouse racking, or local chassis pools treat HC differently. Confirm delivery equipment matches the ocean booking.
When GP still wins for “bulky” cargo
- Weight-bound SKUs (dense liquids, metal) — height unused.
- Door-limited tall units that cannot tip — HC ceiling unused.
- HC scarce on your string while GP is plentiful — schedule risk beats theoretical cube.
- Uneven stack that wastes HC height (partial top tier with crush risk) — see dunnage vs claims.
Light bulky checklist
| Check | Why |
|---|---|
| Useful height after dunnage / slip sheets | Marketing cube ≠ usable cube |
| Door width × height with packaging | Tall ≠ loadable |
| Tier count in GP vs HC | Quantify the extra tier |
| Box count at target utilization | Drives all-in, not % filled |
| Equipment + inland confirmation | Avoid HC ocean / GP delivery mismatches |
Bottom line
For light bulky freight, start with cube and door, not the HC label. If an extra tier (or fewer boxes) is real and the door clears, 40HC is usually the right tree branch. If not, a cheaper 40GP with a clean plan beats shipping empty high-cube air.
Next step: run both equipment types in the container recommender and the Palletizr calculator before you lock the booking.