Loading Space Guides help shippers, freight forwarders, and warehouse teams match a shipment to the equipment profile used in CBM3. Each guide covers the relevant dimensions, payload, tare weight, cargo-volume assumptions, and 3D placement checks behind a practical loading example. It also highlights the limits that must be confirmed with the carrier, terminal, road operator, or loading supervisor before dispatch.
Use these guides with the free CBM3 3D container loading calculator to test actual carton, pallet, crate, or machinery dimensions against a selected loading space. A CBM calculation is only a starting point. Door clearance, stackability, centre of gravity, axle limits, and unloading sequence can all determine whether a loading plan is operationally viable.
Loading Space Guides: Current Pilot Guide
The 20-foot dry container (20DC) is the first profile in this series. It demonstrates a cargo-volume and 3D-placement check using the current CBM3 planning profile. A 20DC is commonly chosen for dense cargo because the permitted payload may be reached before the container’s internal cubic capacity is fully used. Always compare total cargo weight with the permitted payload; volume alone is not a reliable equipment-selection method.
| Planning item | Why it matters | What to confirm |
|---|---|---|
| Internal dimensions | Determines whether cartons, pallets, or oversized pieces can physically fit. | Carrier equipment specification and door-opening dimensions. |
| Usable CBM | Shows the theoretical cargo volume before allowances for voids and the loading pattern. | Actual package dimensions, overhang, and required clearance. |
| Payload and tare weight | Helps prevent the equipment’s gross-weight limit from being exceeded. | Container plate, booking limit, and route restrictions. |
| Centre of gravity | Supports safe handling and road-compliant weight distribution. | Axle-load rules and the vehicle or chassis configuration. |
How to Use Loading Space Guides for Container Loading
- Start with the exact loading space offered for the shipment: container type, trailer, ULD, rail unit, swap body, or pallet format.
- Measure packed cargo rather than relying on product specifications. Enter the external length, width, height, quantity, gross weight, and stacking restrictions.
- Upload a cargo spreadsheet through the CBM3 container loading tool, or enter items directly for a quick feasibility check.
- Compare the result with the relevant profile guide. Review internal dimensions, door access, payload, and any space needed for bracing, dunnage, or required gaps.
- Review the 3D plan in Operational, Realistic Digital Twin, or X-Ray mode. This is particularly useful when cargo fits by CBM but has awkward shapes or restricted access.
- Confirm the final plan with the responsible carrier, operator, or warehouse team, especially where dangerous goods, road limits, or terminal rules apply.
For example, ten standard pallets may fit within a container’s stated volume, but their orientation can create unusable voids or block safe door-side access. The CBM3 simulation shows the physical placement. Its pallet stacking checks can also assess column, brick, and pinwheel patterns against the available support surface.
Truck Loading and Air Cargo Loading Considerations
Loading-space planning is not limited to ocean freight. For Truck Loading, the position of heavy cargo affects axle loads and road compliance. CBM3 calculates the centre of gravity across three axes and flags potential distribution issues, but the final assessment must reflect the actual tractor, trailer, axle group, and applicable local legislation.
For Air Cargo Loading, select the appropriate ULD or air-freight profile and check both physical fit and chargeable weight. Freight charges may be based on volumetric weight rather than gross weight. CBM3 also supports freight calculations, including volumetric and chargeable weight, NMFC class, and loading metres (LDM), helping users compare equipment options before requesting a quote.
Turn a Loading Plan into a Warehouse Instruction
A workable loading plan must be clear enough for the warehouse crew to follow. CBM3 provides animated, step-by-step loading-sequence playback that shows which item should be loaded first. This is especially useful for mixed-SKU shipments, fragile cargo, and multi-stop routes where LIFO loading places the first delivery closest to the doors.
Where cargo requires more than one unit, use multi-container planning to split the shipment across several containers and reallocate items by drag and drop. For recurring product kits, the Equal FCL Solver can distribute mixed SKUs into identical, balanced full-container loads. Once the plan has been checked, export a PDF packing guide from CBM3 with 3D snapshots, loading sequence, and centre-of-gravity diagrams for warehouse and transport partners.
For broader loading and handling principles, see Container Loading for Beginners. That article is a separate introduction; this hub focuses on equipment-specific planning references.
Frequently Asked Questions About Loading Space Guides
Are Loading Space Guides a substitute for carrier confirmation?
No. They are planning references. Internal dimensions, payload limits, equipment condition, booking restrictions, and route rules must be confirmed with the relevant carrier, operator, or warehouse.
Why does cargo fit by CBM but not fit in the 3D loading plan?
CBM measures total volume, not shape. Individual package dimensions, pallet footprints, door openings, non-stackable items, and voids between irregular cargo can make a shipment that is feasible by volume physically impossible to load.
How can I check container weight distribution?
Enter accurate gross weights and package positions in CBM3, then review its three-axis centre-of-gravity calculation and warnings. For road moves, validate the result against the specific chassis, truck, and legal axle-load limits.
Can the guides be used for more than ocean containers?
Yes. CBM3 includes 36 equipment profiles covering ocean containers, trailers, ULDs, rail equipment, swap bodies, and pallets. Select the profile that matches the booked or proposed loading space.
Loading Space Guides provide a disciplined starting point for selecting equipment, checking capacity, and preparing a usable loading instruction. Use the relevant profile guide, validate the actual cargo in CBM3.net, and confirm operational limits before the shipment is loaded.