How do you choose between 20 ft and 40 ft standard, high cube and open top containers? A practical guide to matching container type to your cargo's volume, weight and loading method.
In short
Choosing a container comes down to your cargo's volume, weight and loading method, and to deciding between a 20 ft or 40 ft standard, a high cube or an open top unit. This guide explains the logic behind that decision for exporters and importers. For your sea shipments, Konsol Logistics helps you weigh the equipment choice against the actual dimensions of your cargo.
A wrongly chosen container gets expensive in two ways. Either the cargo does not fit and the shipment is left half loaded on loading day, or you pay freight for equipment bigger than you need. There is a third possibility: the container fills up but the weight limit is exceeded, and the cargo is stopped at the port or on the road.
When selecting equipment, answer three questions. Does the cargo hit its limit by volume or by weight? Will it be loaded through the door or from the top? Is the product regular and low enough to fit a standard box? The answers often point to the container type on their own.
With an internal length of roughly six metres, this container counts as one TEU. It is preferred for heavy, dense cargo such as ceramics, marble, steel products and chemical packaging, because the weight limit comes into play before the volume is full. It also handles small lots comfortably.
With an internal length of roughly twelve metres, this container counts as two TEU. It stands out for light but bulky cargo, such as furniture, textiles, household goods and palletised cartons. Freight per unit of volume is usually more balanced, though with heavy cargo the full capacity may not be usable.
It is about one foot taller than a standard container. For light cargo where cartons are stacked higher, it adds extra volume. Because there may be height limits on roads and at some bridges or tunnels, confirm that the transport route suits it.
It has no solid roof, only a removable tarpaulin. Machinery, pipes and long or tall pieces can be loaded from above by crane. If the cargo exceeds the internal dimensions of the container it is treated as out of gauge; this brings extra charges and special planning and must be stated in the quote from the start.
| Container | Typical cargo | Point to watch |
|---|---|---|
| 20 ft standard | Heavy, dense and small lots | The weight limit can be reached before the volume |
| 40 ft standard | Bulky, light and palletised cargo | Full capacity cannot be used with heavy cargo |
| 40 ft high cube | Light cartons stacked high | Height limits along the route |
| Open top (20 and 40 ft) | Tall, long or crane-loaded pieces | Out-of-gauge excess and tarpaulin lashing |
Choosing the right container is half the work; the real job is placing the cargo correctly. If weight is piled on one side, the cargo is damaged and the load becomes unstable in transit.
Expert note: When you cannot fit the cargo into a standard container, do not jump straight to open top equipment. First calculate the options of reducing the packaging, changing the pallet layout or splitting the cargo into two containers; standard equipment often stays more economical.
Some cargo does not suit a standard container at all. In that case the equipment need should be clarified from the start, and the quote and booking made accordingly.
Supply of these options is more limited than for standard types and requires planning; sharing your product's characteristics early makes the process easier.
Konsol Logistics evaluates suitable container options with you according to the dimensions and loading method of your cargo, and coordinates booking, documentation and tracking steps through its partners and agent network. You can request a quote by entering your cargo details into the Quick Quote form or by speaking with our customer representative.
TEU is the twenty-foot equivalent unit; a 20 ft container counts as one TEU and a 40 ft container as two. FEU stands for a forty-foot container and is used when talking about port and carrier capacities.
If your cargo is heavy and dense, a 20 ft container is usually the better fit; if it is light and bulky, a 40 ft. For a firm decision, compare the gross weight and total volume and have both options priced.
If your cargo is light but stacked high, the extra height helps you fit more cartons. However, if there is a height limit along the route, that advantage may go unused.
An open top container is considered when a piece is too long or too tall to go through the door, or has to be crane-loaded from above. If the cargo exceeds the container's dimensions, out-of-gauge conditions apply.
Standard types are close to each other, but small differences can occur. If you plan the loading down to the last centimetre, have the current internal dimensions of the equipment confirmed in writing by the carrier.
In LCL, extra charges apply when the cargo exceeds the standard limits: if a single piece weighs more than 3000 kg, is longer than 300 cm, taller than 230 cm or wider than 220 cm, an overweight, overlength, overheight or overwidth charge respectively comes into play.
These charges can differ from port to port, so get confirmation before booking for cargo that exceeds the dimensions. Also bear in mind:
Stating the real dimensions and weight of your pieces in the quote request reduces the risk of surprise extra charges.
Equipment is chosen according to the size, weight and route of the cargo: a lowbed trailer is generally suited to heavy machines of limited height, and flat rack or breakbulk to pieces that do not fit a standard container.
These pairings are a guide, not a rule: the same generator may make more sense by road on a lowbed on one route and by sea on a flat rack on another. Besides the freight amount, look at the number of handlings, the transfer points and the conditions at the delivery site.
A reefer container does not cool the cargo; it only maintains it at the target temperature, so the product must already be at the required temperature when it enters the container. For a pallet loaded warm, the unit cannot reach equilibrium however long it runs.
If there is a deviation, tell the carrier and the consignee immediately and keep the record; settling the deviation procedure before shipment saves time.
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