Why CBM, not weight, decides what your racking shipment costs
Racking is mostly air once it is flat-packed. Understanding volume and loading is the difference between a full container and a half-empty one.
Steel racking ships flat: uprights bundled, beams nested, shelf plates stacked. The result is a product that is heavy but voluminous, and in sea freight the volume usually runs out before the payload does. That is why a racking quotation that does not state packing dimensions is not a delivered-cost quotation.
The three numbers to ask for
- Packed volume per unit — cubic metres per bay or per shelf unit, after bundling.
- Gross weight per bundle — needed for the loading plan and for the destination handling equipment.
- Loading quantity — how many units fit a 20GP and a 40HQ, as a range, since nesting varies with the mix.
A 40HQ has roughly 76 m³ of internal volume and a payload in the high twenties of tonnes; a 20GP is around 33 m³. With racking, the volume figure is normally the binding constraint, so mixing long uprights with short shelf plates in one container needs a loading plan rather than a guess.
What changes the packing
Colour and coating add a drying and curing constraint rather than volume. Packaging type does change volume: a bundled load wrapped in stretch film uses less space than the same load boxed. If your warehouse receives the goods and needs to handle them without a crane, say so — the packing can be planned around a forklift and a pallet truck instead.
