20ft Open Top High Cube Loading Calculator
Test the 20OTHC profile with your packaged cargo. The high-cube profile does not establish roof-aperture clearance or authorize out-of-gauge cargo.
Test the quantity you enter and review placed and unplaced cargo. This is a planning estimate, not a maximum-capacity guarantee or transport approval.
A 20ft open-top high cube gives more interior planning height, not automatic roof-entry approval. CBM3 20OTHC uses a 589.2 x 234.7 x 264.8 cm envelope, about 36.618 m3, and a 27,970 kg cargo limit. Its default rear door is 233.5 x 258 cm. Test your entered order without silently removing that access constraint.
Open the 20OTHC loading planner. Start a new job and confirm the equipment before entering cargo. The initial selection does not start a calculation; a saved job or your own selection takes priority.
Planning profile and carrier example
| Field | CBM3 11.63.55 profile | Hapag-Lloyd fleet example |
|---|---|---|
| Length x width x height (cm) | 589.2 x 234.7 x 264.8 | 589.2 x 234.7 x 264.8 |
| Door width x height (cm) | 233.5 x 258 | 233.5 x 258 |
| Roof opening length x width (cm) | 539.1 x 222.7 | 539.1 x 222.7 |
| Cargo payload (kg) | 27,970 | 27,970 |
| Tare (kg) | 2,510 | 2,510 |
| Maximum gross mass (kg) | 30,480 | 30,480 |
| Volume (m3) | 36.618 rectangular envelope | 36.8 published nominal |
The Hapag-Lloyd 20ft Open Top High Cube specification describes a carrier fleet example, not every container of that name. Nominal volume and the rectangular planning volume are different measures. Obtain the booked unit’s measurements and limits; missing profile values do not mean an access check passed.
Extra height does not disable the door check
The default profile fills the rear-door constraint from its catalog entry. An upright 250 cm test package fits; a separate 260 cm test package is rejected by both automatic methods despite fitting the interior height. CBM3 does not automatically switch to a roof-entry route when a package fails the rear-door check. Changing an access constraint is not evidence that a physical lift is feasible.
The additional 260 cm test used one 40 x 60 cm, 100 kg upright non-stackable box, with Horizontal Only rotation. Both methods returned zero placed and one unplaced. This is a test of the current configured door limit, not a judgment about an operator-approved alternative loading method.
Reproduce two cargo examples
Use metric units, palletization off, Horizontal Only rotation, no global rules, Normal priority and no delivery stop. Fragile is off and no extra stack-weight limit is supplied. Leave equipment constraints at their defaults; the High Cube presets supply rear-door dimensions. Enter complete outer dimensions and weight, including any base once.
| Example | Width x length x height (cm) | Entered units | kg per unit | Input volume m3 | Stackable | This Side Up |
|---|---|---|---|---|---|---|
| A: cartons | 40 x 60 x 80 | 40 | 25 | 7.680 | Yes | No |
| B: upright 250 cm | 40 x 60 x 250 | 1 | 100 | 0.600 | No | Yes |
| Example | Method | Entered | Placed | Unplaced | Allocated containers | Placed volume m3 | Placed mass kg |
|---|---|---|---|---|---|---|---|
| A | Max Volume | 40 | 40 | 0 | 1 | 7.680 | 1,000 |
| A | Best Balance | 40 | 40 | 0 | 1 | 7.680 | 1,000 |
| B | Max Volume | 1 | 1 | 0 | 1 | 0.600 | 100 |
| B | Best Balance | 1 | 1 | 0 | 1 | 0.600 | 100 |
Example B fits the interior and configured rear-door dimensions; it does not certify the path, handling equipment or securing. The B input is 0.600 m3 and 100 kg whether placed or not. Keep a required upright package upright rather than changing permissions to obtain a passing result.
Recorded on 6 October 2026 with the installed 11.63.52 Worker and the current equipment-constraint helpers in Node. Independent checks cover counts, orientation, bounds, overlap, support and payload. These are reproducible engine examples, not actual browser, crane, lifting, floor-strength or physical-loading acceptance tests.
From a geometric plan to a loading decision
- Confirm the actual container and the intended entry route with the responsible operator. Do not equate roof length, interior length and end-door clearance.
- Review complete-unit weight, contact area, lifting provisions and securing with the loading team. CBM3’s cargo-weight ceiling and estimated center of gravity do not certify floor strength or axle loads.
- Keep height within the modeled envelope. This workflow is not an out-of-gauge booking or unlimited-height solver; ask the operator to assess any load extending beyond the assigned unit.
- Check every placed and unplaced quantity before sharing a plan. Extra search time is not an optimum-result guarantee. Account access and export availability follow the current tool controls, not a promise of unlimited anonymous use.
Related open-top and planning guides
Compare 20ft open top container loading guide, 40ft open top container loading guide, 40ft open top high cube loading guide. For the workflow, read the step-by-step planning guide, or return to the loading-space guide directory.
Check Height, Opening and Complete-Unit Weight Separately
Measure the complete outside package, including base, crate, wrapping and protrusions. Keep required upright units upright and use actual stacking permissions. A built pallet’s base height and tare are included once; do not palletize it again. The 250 cm example contains one 40 x 60 cm, 100 kg unit, so input and placed cargo volume are 0.600 m3 in the recorded plan. Cargo mass excludes unknown securing material and is not VGM.
The profile also lists a roof opening of 539.1 x 222.7 cm, smaller than the internal footprint. This is reference metadata, not a simulated vertical lift, sling-clearance or crane-capacity check. The additional 260 cm upright test is below the interior ceiling but above the 258 cm default rear door and remains unplaced. Keep that default behavior distinct from an operator’s separate loading-route assessment.
20ft Open-Top High Cube Questions
What extra height does 20OTHC provide over 20OT?
The current rectangles have 264.8 cm and 235 cm interior heights respectively. Compare the same cargo dimensions, weights and rules. Extra ceiling space does not mean the doorway or roof path accommodates every tall package.
Why does a 250 cm package fit but a 260 cm package fail?
The default rear-door height is 258 cm. Both packages fit the interior height, but the 260 cm diagnostic exceeds that entry constraint. The recorded outcomes preserve the configured door check instead of treating an open top as a bypass.
Can I select a roof-loading route in this calculator?
This workflow does not automatically substitute a roof-ingress or crane-lift solver. A changed constraint would not prove a physical lift feasible. Ask the responsible operator to assess the actual unit and planned handling procedure separately.
Does the carrier’s no-roof-bars height replace this profile?
No. It describes a different equipment configuration. The current planning rectangle remains 264.8 cm high; neither that specification nor an empty open roof authorizes unlimited-height transport.
Does staying below payload prove the floor can support machinery?
No. Total cargo mass and local contact loads are different concerns. This example does not approve bearing area, floor strength, lifting provisions, securing or route limits. Assess those with the responsible loading team.
References and Check Dates
Named technical reference: Hapag-Lloyd 20ft Open Top High Cube fleet specification, read 7 October 2026. CBM3 11.63.55 profile/source compatibility was checked 7 October. Original 11.63.52 carton, upright and door-diagnostic results remain dated 6 October. The conceptual AI illustration is not one of these recorded layouts.
Software compatibility note, 8 October 2026 (Europe/Istanbul): The planning profiles and recorded example inputs were checked against the source-reviewed CBM3 11.63.56 candidate. The earlier example execution dates remain unchanged; this compatibility review is not a new optimization run or physical-loading test. Fleet-provider and carrier references are not manufacturer approval. Confirm the actual unit dimensions, payload and securing requirements.
How to inspect and hand over a loading plan
Use the selected plan and the complete shipment data. Recheck the result after changing cargo, equipment or handling rules.
See every cargo unit in context
Search the cargo inventory, focus on an item and switch between realistic, operational, top and side views. Inspect pallet layers and height sections.
The inventory separates requested units, units in the selected container, units in other containers and unplaced units. Select a row to find its cargo in the scene; playback and height sections show only part of the complete plan.
Use pallet details to inspect full, partial and mixed pallets. A height section filters the view; it does not remove cargo from the plan. Vehicle bodies and wheels provide visual context.
Prepare clearer warehouse instructions
Use product colors and short codes, named groups and delivery stops. Choose a summary or warehouse PDF for the selected plan.
Assign product colors and short codes to connect the cargo table, 3D view and reports. Group and stop names improve instructions; apply the appropriate loading rules when a sequence must be enforced.
Compare verified alternatives and review any manual moves. A manual reallocation affects the current preview and PDF; saved or shared inputs recalculate the automatic arrangement when reopened. Export again after changes.
Read the estimated center of gravity
Review longitudinal, lateral and height coordinates from known cargo and pallet masses. Check the displayed origin and units before comparing plans.
The estimate assumes each item's mass is centered and excludes vehicle tare. Missing or stale additional-material records can leave the complete-load assessment unavailable; explicitly declare none when no extra materials are present.
Coordinates use the load-space frame, not road height. For Step Deck, X starts at the raised front end and Y at the lower-deck datum; axle-form distances run from the rear toward the cab.
Distinguish the loading unit from its carrying vehicle
This loading unit alone does not define an axle configuration.
Inspect cargo and pallet weight distribution in this loading space. A container, swap body or air-cargo unit does not identify the road chassis, rail wagon or aircraft carrying it.
Axle estimates are available after selecting a supported complete road or rail vehicle. Enter its actual mounting positions, full empty reactions and applicable limits; do not reuse a trailer reference as container or aircraft approval.