Sea freight

Container types

Logistics glossary 6 min

Container types are the standardized variants of the box that moves world trade. The most common are the 20 and 40 foot standard, the high cube (40 foot with extra height) and the specials: refrigerated (reefer), open top for tall cargo and flat rack for anything that will not fit in a closed box. Below are all nine, each with its figure and its dimensions.

Container types: different container types stacked

The 9 types, with their dimensions

All nine figures are drawn at the same scale: the 20′ looks half the 40′ because it is. Tap each one to open it. The figures come from a sample series of the Hapag-Lloyd fleet; each carrier and each build year changes them by a few millimeters and kilos, so for an actual shipment the CSC plate of the assigned container is what counts.

20′ standard (20′ DV)

Ext. 6,058 × 2,438 × 2,591 mm Int. 5,900 × 2,352 × 2,393 mm · 33.2 m³
A 20' standard with the side wall off: 1.2 × 1.0 m pallets along the row facing the side. It is the box for dense cargo, the kind that hits the weight limit before it fills the space.

The basic dry box: closed, corrugated steel, doors at one end. It suits dense cargo such as hardware, ceramics, metals or small machinery, which reaches the weight limit before it fills the space. Many 20′ units have forklift pockets in the base so they can be moved empty with a forklift.

ItemValue
Inside dimensions5,900 × 2,352 × 2,393 mm
Door opening2,340 × 2,292 mm
Capacity33.2 m³
Tare2,300 kg
Max. payload30,200 kg
Max. gross weight32,500 kg

40′ standard (40′ DV)

Ext. 12,192 × 2,438 × 2,591 mm Int. 12,032 × 2,352 × 2,395 mm · 67.7 m³
The 40' standard at the same scale as the 20': twice the length and twice the volume, with almost the same maximum payload.

The same width and height as the 20′, twice the length. It works for general cargo of medium volume. Its maximum payload is almost the same as the 20′: what you gain is space, not weight.

ItemValue
Inside dimensions12,032 × 2,352 × 2,395 mm
Door opening2,340 × 2,292 mm
Capacity67.7 m³
Tare3,700 kg
Max. payload28,800 kg
Max. gross weight32,500 kg

40′ High Cube (40′ HC)

Ext. 12,192 × 2,438 × 2,896 mm Int. 12,032 × 2,352 × 2,700 mm · 76.3 m³
The 40' High Cube opened up. The green line marks the inside height of a 40' standard: the 30 cm above it are what the High Cube adds.

Like the 40′ standard but 30 cm taller, outside and inside: 9’6” against 8’6”. It is one of the most requested boxes for light, bulky cargo from China, such as furniture, electronics, textiles or plastics. Before booking it, confirm the total height on the chassis for the trucking leg at destination.

ItemValue
Inside dimensions12,032 × 2,352 × 2,700 mm
Door opening2,340 × 2,597 mm
Capacity76.3 m³
Tare3,850 kg
Max. payload28,650 kg
Max. gross weight32,500 kg

45′ High Cube (45′ HC)

Ext. 13,716 × 2,438 × 2,896 mm Int. 13,556 × 2,352 × 2,700 mm · 86.0 m³
The 45' High Cube, the longest of the family: High Cube height and 1.5 m more length than the 40'.

1.52 m longer than the 40′, with High Cube height: it adds about 10 m³ over the 40′ HC. Not every route or carrier offers it, and at destination you need to confirm the length is allowed on the trucking leg.

ItemValue
Inside dimensions13,556 × 2,352 × 2,700 mm
Door opening2,340 × 2,597 mm
Capacity86.0 m³
Tare4,700 kg
Max. payload27,800 kg
Max. gross weight32,500 kg

Refrigerated (40′ reefer High Cube)

Range −40 °C to +30 °C Int. 11,578 × 2,280 × 2,525 mm · stow up to 2,425 mm
The reefer seen from its cooling unit. Opened up, the red line is the maximum stowage height: cold air has to flow above it.

An insulated box with its own cooling unit at the front, plugged into power at the terminal and on board. The insulation makes it narrower inside than a dry box, and cargo stays below the red line: cold air has to flow through the T-floor and above the goods. It is built to hold a temperature, not to bring it down, so cargo has to arrive already at its transport temperature.

ItemValue
Inside dimensions11,578 × 2,280 × 2,525 mm
Max. stowage height2,425 mm
Door opening2,276 × 2,535 mm
Capacity66.7 m³
Tare4,300 kg
Max. payload29,700 kg
Max. gross weight34,000 kg
Temperature range−40 °C to +30 °C

Open top (40′)

Int. 12,029 × 2,350 × 2,380 mm No rigid roof: loaded from above by crane
A 40' open top with the tarp and roof bows off: the piece goes in from above by crane and can stand taller than the box.

Walls like a dry box, but no rigid roof: a removable tarp over roof bows. It is loaded from above by crane, for pieces that do not fit through the door or stand taller than the box. If the piece sticks out above the height, the shipment is quoted as out-of-gauge cargo.

ItemValue
Inside dimensions12,029 × 2,350 × 2,380 mm
Capacity66.5 m³
Tare4,050 kg
Max. payload28,450 kg
Max. gross weight32,500 kg
RoofLona removible sobre arcos

Flat rack (40′ High Cube)

Between posts 11,652 × 2,224 mm Payload 44,050 kg · gross 50,000 kg
A 40' flat rack with a transformer chained to the deck lashing rings. No roof and no side walls: cargo can be taller and wider than the rack.

A reinforced deck with two end walls and no side walls or roof. It is for heavy machinery, vehicles, coils or transformers, loaded from above or from the side and lashed to the deck rings. It takes cargo taller and wider than the box, with a surcharge and special stowage on board. In the Hapag-Lloyd series the end walls fold down.

ItemValue
Length between posts11,652 mm
Width between posts2,224 mm
Floor to top height2,248 mm
Deck height648 mm
Tare5,950 kg
Max. payload44,050 kg
Max. gross weight50,000 kg

Platform (40′)

Deck 12,192 × 2,245 mm Payload 44,050 kg · takes over-width cargo
A 40' platform carrying a boiler shell wider than the deck, on two cradles. With no end walls, the over-width has nothing to hit.

Just the deck, no end walls: in many fleets it is a flat rack with its end walls folded down. It carries very long, wide or heavy pieces that will not take any wall, such as boilers, steel structures or boat hulls. All the load sits on the beam, so weight distribution is planned piece by piece.

ItemValue
Deck12,192 × 2,245 mm
Deck height648 mm
Tare5,950 kg
Max. payload44,050 kg
Max. gross weight50,000 kg

ISO tank (20′)

Nominal capacity 24,000 L Filled to 90 % · usual range 80 to 95 %
A 20' ISO tank inside its frame. The sight gauge on the end frame rises to 90 %, inside the window where the liquid does not surge in transit.

A cylindrical vessel, usually stainless steel, inside a frame with the size and corner castings of a 20′ container. It carries bulk liquids: chemicals, oils or liquid food. It is not filled to the top or halfway: it is normally loaded between 80 and 95 % of capacity so the liquid does not surge against the walls in transit. If the product is hazardous, the dangerous goods rules apply.

ItemValue
External dimensions6,096 × 2,438 × 2,591 mm
Nominal capacity24,000 L
Tare3,600 kg
Max. payload32,400 kg
Max. gross weight36,000 kg
Usual filling80 to 95 %

Which one fits which cargo

The 40 foot and the high cube dominate general cargo; the 20 foot suits dense goods that hit the weight limit before filling the volume. The reefer keeps the cold chain with its own unit, and open top and flat rack solve machinery and out-of-gauge pieces, with the handling and rates of project cargo.

Why it matters when importing from China

When quoting FCL and when planning the load: the type and size of the box define how much fits, how it is stowed and what the freight costs. Good cubing sometimes saves an entire container; bad cubing sends paid-for air across the Pacific.

The common mistake

Cubing with the container’s external dimensions, or ignoring the weight limit. What rules are the internal dimensions, the door opening and the weight caps per container and per road at destination: filling a heavy cargo to the volume limit can leave you over the legal weight on the trucking leg.

Send us your packing list and we tell you which container fits and how to stow it: write to us or quote sea freight directly.

Source: Hapag-Lloyd, Container Specification (sample series of its fleet); ISO tank: OEG, ISO tanks datasheet. External dimensions per ISO 668.

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