Container 20G1 (Low Cube)
The 20G1 (Low Cube) shipping container is one of the most frequently used types of shipping containers in international logistics and freight transport. Although it is often mentioned alongside its taller cousin – the High Cube container – the 20G1 Low Cube holds a very specific place in the transport industry. In this comprehensive guide, you will find everything you need to know about this type of container: its dimensions, specifications, ISO designation, practical applications, and differences from other types.
What is a 20G1 (Low Cube) Shipping Container?
Definition and Basic Characteristics
The 20G1 (Low Cube) shipping container is a standardized shipping container with a length of 20 feet (approximately 6.06 meters) and a lower height than the classic standard container. The designation “20G1” is a code according to the international standard ISO 6346, which regulates the identification and marking of all shipping containers used in international trade. The letter “G” in the code indicates “Low Cube” (reduced height), while “1” indicates the equipment category.
The term “Low Cube” comes from English and refers to the geometric property of the container – it has a smaller internal volume than a standard 20′ container, precisely because of its reduced height. This lower height (approximately 2.44 meters) is intentional and has specific practical reasons, which we will explain further.
The 20G1 Low Cube belongs to the category of dry containers, which means it is intended for the transport of various goods without special requirements for air conditioning or cooling systems. It is a robust steel or aluminum container with tight doors at the rear and standard fastening points for safe securing of cargo.
| Characteristic | 20G1 Low Cube | 20′ Standard (1C) | 20′ High Cube (1CC) |
|---|---|---|---|
| ISO 6346 Code | 20G1 | 2010 / 1C | 1CC |
| External Height | 2.44 m (8 ft) | 2.59 m (8.5 ft) | 2.896 m (9.5 ft) |
| Internal Volume | ~31 m³ | ~33 m³ | ~38 m³ |
| Typical Use | Low-stacked cargo, conversions | Universal transport | Maximum capacity |
| Price Category | Medium | Lowest | Higher |
Where is the 20G1 Used in Practice?
The 20G1 Low Cube container is used in a number of practical situations and industries. It is primarily chosen for transporting low-stacked cargo – i.e., goods that cannot be stored too high without the risk of damage. Examples include heavy metal components, building materials, automotive parts, or delicate goods with low weight and larger dimensions.
In logistics and storage, the Low Cube is used when lower center of gravity and stability are important. The lower center of gravity of the container means it is safer during road transport, especially in curves or on uneven terrain. This is particularly important for long-distance transport.
Another popular application is the conversion of containers into residential and working spaces. The lower height of the Low Cube may seem like a disadvantage, but for many projects (garages, storage spaces, small offices) this height is perfectly sufficient and sometimes even preferred due to lower construction costs and better proportions of the building.
What are the Exact Dimensions and Specifications of the 20G1?
External Dimensions of the Container
The external dimensions of the 20G1 Low Cube are precisely standardized by the international standards ISO 6346 and ISO 668. These dimensions are important for planning the transport, handling, and storage of containers.
| Dimension | Millimeters | Meters | Feet |
|---|---|---|---|
| Length | 6,058 mm | 6.06 m | 20 ft |
| Width | 2,438 mm | 2.44 m | 8 ft |
| Height (Low Cube) | 2,440 mm | 2.44 m | 8 ft |
| Height (Standard for comparison) | 2,591 mm | 2.59 m | 8.5 ft |
| Height (High Cube for comparison) | 2,896 mm | 2.90 m | 9.5 ft |
As you can see, the difference between the Low Cube and the standard container is approximately 15 centimeters (151 mm exactly). Although this may seem small, this difference in height has a fundamental impact on the internal volume and practical applications.
External dimensions are critical for determining whether the container will fit on your cargo, in your warehouse, or in the available space in the transport vehicle. For example, if you have a height restriction in the space where you want to place the container (such as in a garage or under a bridge), the Low Cube is the only choice.
Internal Dimensions and Usable Space
Internal dimensions are even more important than external ones, as they determine how much cargo actually fits inside. Note that internal dimensions are smaller than external ones – this is due to the thickness of the container walls (usually 1.5–2 cm of steel wall).
| Dimension | Millimeters | Meters | Feet |
|---|---|---|---|
| Internal Length | 5,910 mm | 5.91 m | 19.4 ft |
| Internal Width | 2,345 mm | 2.35 m | 7.7 ft |
| Internal Height (Low Cube) | 2,350 mm | 2.35 m | 7.7 ft |
| Internal Height (Standard) | 2,385 mm | 2.39 m | 7.8 ft |
The internal space of a Low Cube container is approximately 31 cubic meters (1,100 cubic feet). This is sufficient for a typical cargo, but slightly less than a standard 20′ container with 33 m³. The difference of 2 m³ seems minimal, but it shows when packing large quantities of goods.
In practice, this means that if you were to transport a shipment that just barely fits in a standard 20′ container, it may not fit completely in a Low Cube – you will have to choose a 40′ container, which increases costs. Therefore, it is important to carefully plan the cargo before choosing the type of container.
Weight and Load Capacity
The weight of the container (also called tare) and its load capacity are critical for the safety and legality of transport.
| Parameter | Kilograms | Pounds |
|---|---|---|
| Tare (container’s own weight) | 2,160 kg | 4,760 lbs |
| Maximum Gross Weight | 30,480 kg | 67,200 lbs |
| Payload (maximum cargo) | 24,000–27,470 kg | 53,000–60,500 lbs |
The payload varies slightly depending on the age of the container, its condition, and the specific manufacturer. Older containers may be rated more conservatively and have a lower permitted load capacity.
In practice, this means that in a 20G1 Low Cube container you can safely load approximately 25 tons of cargo (with standard load capacity). If you wanted to load a heavier cargo, you would have to choose a 40′ container, which has a higher overall load capacity.
How is the 20G1 Designated According to ISO 6346?
Explanation of the ISO Designation
The code 20G1 according to the standard ISO 6346 consists of four characters, each with a specific meaning:
- 2 = Length of the container. The digit “2” means 20 feet (6.1 meters). The digit “4” would mean 40 feet.
- 0 = Type of container. Zero indicates General Purpose – i.e., a container suitable for various goods.
- G = Height and width of the container. The letter “G” means reduced height – precisely our Low Cube. The letter “C” would indicate standard height (8.5 feet), and “D” would mean High Cube (9.5 feet).
- 1 = Equipment category. The one indicates the basic category with fixed doors at the rear.
The older designation system (used until 1995) used the code 2010 for the same type of container. Today, you are more likely to encounter the modern ISO 6346 code 20G1, but both codes designate the same container.
Container Marking System
The standard ISO 6346 is not just about the dimension code. The entire container marking also includes:
- Owner code (3 letters) – for example “HZK” for HZ KONTEJNERY
- Serial number (6 digits) – a unique identifier for each container
- Check digit (1 digit) – a mathematically calculated value to verify the correctness of the code
- Dimension and type code (4 characters) – precisely our 20G1
Example of complete marking: HZKU 611832 1 / 20G1
This marking is painted on the front and rear of the container and is also recorded in international databases. This enables tracking and management of containers during their journey around the world. When a container passes through a port, a road check, or a logistics center, operators scan this marking and know exactly which container it is.
What is the Difference Between Low Cube, High Cube, and Standard Container?
Comparison of Heights and Capacities
This is the most common question people ask. All three types have the same length (20 feet), but differ in height and therefore in internal volume. Let’s compare them in detail:
| Characteristic | Low Cube (20G1) | Standard (1C) | High Cube (1CC) |
|---|---|---|---|
| External Height | 2.44 m (8 ft) | 2.59 m (8.5 ft) | 2.90 m (9.5 ft) |
| Internal Volume | 31 m³ | 33 m³ | 38 m³ |
| Internal Height | 2.35 m | 2.39 m | 2.70 m |
| Maximum Load Capacity | 24–27 t | 24–27 t | 24–27 t |
| Typical Use | Low-stacked cargo, conversions | Universal, most common | Maximum capacity, light goods |
| Relative Price | Medium | Lowest | Higher |
| Transport Safety | Best (lower center of gravity) | Good | Worse (higher center of gravity) |
Advantages and Disadvantages of the Low Cube
Advantages of the Low Cube:
- Lower center of gravity – The container is more stable during transport, tilts less in curves. This is particularly important for long-distance transport on highways.
- Safety – A lower center of gravity means a lower risk of tipping over. This is why the Low Cube is often used for transporting dangerous goods or high-value materials.
- Practicality for conversions – If you want to convert a container into housing or office, the lower height means lower construction costs and often looks better proportionally.
- Space availability – If you have height restrictions (garage, warehouse under a bridge), the Low Cube fits where the High Cube does not.
Disadvantages of the Low Cube:
- Lower capacity – You have 7 m³ less space than the High Cube. For large quantities of light goods, this means you may have to choose a 40′ container.
- Higher price per m³ – Although the price of the container is lower, the price per cubic meter is higher because you have less space.
- Less common – The Low Cube is less popular than the standard container, so it can be harder to rent or buy. Market availability is limited.
What is the Internal Volume and Capacity of the 20G1?
Volume in Cubic Meters
The internal volume of the 20G1 Low Cube is approximately 31 cubic meters (1,100 cubic feet). This number is calculated simply: internal length × internal width × internal height.
5.91 m × 2.35 m × 2.35 m = 31.0 m³
The volume is important for cargo planning. If you have a shipment that occupies more than 31 m³, you will not be able to load it into a single Low Cube container. You will have to choose a 40′ container (volume 67.7 m³) or send the shipment in multiple containers.
Note: The actual available volume is slightly smaller, because the container doors take up space and you usually want to leave some space for handling the cargo. In practice, count with 28–30 m³.
How Much Fits in a Container?
This is a practical question that everyone who uses a container asks. The answer depends on the type of cargo:
Pallets:
- Approximately 10–11 European pallets (1,200 × 800 mm) placed in a single layer side by side fit in a 20G1 Low Cube.
- If you wanted to stack pallets (2 layers), 5–6 pallets fit. But this depends on the height of the goods on the pallet.
Boxes:
- If you pack standard boxes (60 × 40 × 40 cm), approximately 300–400 pieces fit, depending on the exact arrangement.
Heavy items:
- If you transport heavy items (for example, steel components), you are limited more by the load capacity (25 tons) than by the volume. Simply put: the container fills up before it reaches the maximum weight.
What is the Load Capacity and Maximum Load?
Safety Limits
The maximum load capacity of the 20G1 Low Cube is approximately 24,000–27,470 kg depending on the specific container. This number is the difference between the maximum gross weight (30,480 kg) and the tare of the container (2,160 kg).
This is not just a theoretical number – it is a legal limit. If you exceed the maximum load capacity, you violate road regulations and risk fines, confiscation of the cargo, or even a driving ban. Transport companies are obliged to check the weight of the cargo.
In practice, this means:
- If you have a cargo weighing more than 30 tons, you cannot load it into a single 20G1 container. You must split it into two containers or use a 40′ container.
- If you have a light cargo (for example, polystyrene), you are limited more by the volume (31 m³) than by the weight.
Practical Implications for Logistics
The load capacity affects the optimization of transport. Logisticians must balance two factors: volume and weight.
Scenario 1: Heavy cargo
- You have 25 tons of steel components. They fit in the 20G1 (load capacity 24–27 t), but occupy only 15 m³ of space.
- Decision: You can add more light cargo (up to 31 m³), or send the container with “dead space.” The second option is disadvantageous in terms of costs.
Scenario 2: Light cargo
- You have 5 tons of light goods that occupy 28 m³.
- Decision: The container is almost full, but you still have 22 tons of capacity. If you have more cargo, you can add it.
Scenario 3: Very light cargo
- You have 2 tons of goods that occupy 25 m³.
- Decision: The container is not even close to full. You have to wait for more cargo or pay for “empty” space.
These decisions have a direct impact on transport costs and logistics efficiency.
What are the Main Applications and Use Cases?
Freight Transport and Logistics
The 20G1 Low Cube is particularly popular for the transport of certain types of goods. One of the main reasons is the lower center of gravity, which increases safety during transport.
Typical commodities transported in Low Cube:
- Automotive parts – engines, transmissions, chassis. These are relatively heavy and low.
- Building materials – steel, cement, bricks. Heavy and low-stacked.
- Metal components – steel profiles, sheets, pipes. Heavy, low-stacked.
- Glass and ceramics – delicate goods that require stability. A lower center of gravity means fewer vibrations.
In international logistics, the Low Cube is used especially for domestic distribution (transport from the port to individual warehouses). The high stability is an advantage here, because the container passes through many curves and uneven terrain.
Storage and Long-Term Preservation
The 20G1 Low Cube is also popular for static storage. The lower height means it fits into warehouses with lower ceilings, which are cheaper to operate.
Practical applications:
- Modular warehouses – Containers are stacked on top of each other. The lower height of the Low Cube means you can build more layers without increasing the height of the building.
- Covered storage areas – Where height is limited, the Low Cube is the ideal choice.
- Long-term storage – If you want to store goods for 6 months or longer, the Low Cube is an economical solution.
The lower height also has another practical advantage: it is easier to reach the upper part of the cargo without a high ladder. This improves safety and work efficiency.
Conversions and Non-Traditional Uses
One of the most popular applications of the Low Cube recently is conversion into residential and working spaces. The lower height may seem like a disadvantage, but it has its advantages:
- Lower construction costs – Less material for walls, less insulation.
- Better proportions – A lower building often looks better and is less “heavy.”
- Lower heating/cooling costs – A smaller volume means lower energy costs.
- Portability – A lower center of gravity means the container can be moved more easily.
Typical projects with Low Cube:
- Garages and workshops – The height of 2.44 m is sufficient for parking a car or working in a workshop.
- Storage spaces – Smaller warehouses for various items.
- Offices and studies – Compact working spaces.
- Hosting units – Small apartments or recreational cabins.
What are the Common Misconceptions About the 20G1?
Misconception 1: “The Low Cube is always cheaper”
Many people think that the Low Cube is cheaper only because it has a smaller volume. This is not always true.
The price of a container on the market depends on many factors:
- Age of the container – An old Low Cube can be more expensive than a new standard container.
- Condition – A damaged Low Cube is cheaper than an undamaged one.
- Demand – If there is a high demand for Low Cube in a region, the price rises.
- Availability – The Low Cube is less common, so it can be more expensive.
On average, the Low Cube is 5–10% cheaper than the standard container, but this is not a rule.
Misconception 2: “The Low Cube is worse for transport”
The opposite is true. The lower center of gravity of the Low Cube makes it safer for transport. It tilts less in curves, is more stable, and safer.
Standard and High Cube containers have a higher center of gravity, which means a greater risk of tipping over in extreme conditions. This is why Low Cubes are preferred for transporting dangerous goods and for long road routes.
Misconception 3: “The Low Cube fits everywhere”
Although the Low Cube is lower, it still has an external height of 2.44 meters. This is not always sufficient. For example:
- Under bridges with limited height (< 2.5 m), the Low Cube barely fits.
- In some garages it fits, in others it does not.
- During transport on lower trailers, the Low Cube may not fit.
Always check the available height before choosing a Low Cube.
How does the 20G1 Differ from Older Designations?
Historical Development of ISO Marking
The ISO 6346 standard was first adopted in 1970 but was updated in 1995. The old designation (until 1995) used the code 2010 instead of the modern 20G1. Both codes designate the same type of container – a lower 20′ container.
Reasons for the change:
- More precise classification – The new system distinguishes more types of containers.
- International standardization – This facilitated trade and communication.
- Technological progress – New types of containers (for example, High Cube) required new codes.
Today, the old codes are no longer used, but older containers may have both designations painted on the wall. If you see “2010” on an old container, know that it is a Low Cube.
What are the Future Trends in Container Transport?
Technological Innovations
The container industry is constantly evolving. Some future trends:
- IoT tracking – Containers will be equipped with sensors that will monitor location, temperature, and humidity. This will allow better protection of sensitive cargo.
- Lighter materials – New containers will be made of lighter materials (aluminum, composites), which will reduce the tare and increase the payload.
- Modular configurations – Containers will be produced that can be easily divided or combined to better utilize space.
- Sustainability – The growing emphasis on recycling and reducing the carbon footprint will mean greater use of recycled materials and more energy-efficient processes.
Impact of Climate Change and Logistics
Climate change will affect the transport industry. Higher temperatures and extreme weather will require more robust containers. The Low Cube, with its lower center of gravity and better stability, will probably be used more and more in areas with unstable weather.
At the same time, the growing pressure to reduce emissions will mean more intermodal transport (combination of train, ship, and truck), where the stability of the container is essential.
Frequently Asked Questions
What does “20G1” mean in ISO 6346?
20G1 is a code according to the ISO 6346 standard. “20” means a length of 20 feet, “G” means reduced height (Low Cube), and “1” indicates the equipment category with standard doors. The older code for the same container was “2010.”
What is the difference between Low Cube and High Cube?
The Low Cube has a height of 2.44 m and a volume of 31 m³. The High Cube has a height of 2.90 m and a volume of 38 m³. The Low Cube is safer for transport (lower center of gravity), while the High Cube offers more space. The choice depends on the type of cargo and requirements.
How many pallets fit in a 20G1 Low Cube?
Approximately 10–11 European pallets (1,200 × 800 mm) fit in a 20G1 in a single layer. If you want to stack pallets, 5–6 pallets fit, but this depends on the height of the goods on the pallet.
What is the maximum load capacity of the 20G1?
The maximum load capacity of the 20G1 Low Cube is approximately 24,000–27,470 kg (24–27 tons) depending on the specific container and its age.
Where is the 20G1 used?
The 20G1 is used for the transport of low-stacked cargo (automotive parts, building materials, steel), storage in spaces with limited height, and conversions into residential and working spaces.
Is the Low Cube cheaper than the standard container?
On average, the Low Cube is 5–10% cheaper, but the price depends on many factors (age, condition, availability). It is not always the cheaper choice.
What is the internal volume of the 20G1 Low Cube?
The internal volume is approximately 31 cubic meters (1,100 cubic feet). In practice, count with 28–30 m³ of available space.
Why is the Low Cube safer for transport?
The lower height of the Low Cube means a lower center of gravity. This increases the stability of the container during transport, especially in curves and on uneven terrain. It tilts less and there is less risk of tipping over.
Can a Low Cube be converted into housing?
Yes, the Low Cube is often converted into residential spaces. The lower height means lower construction costs and often looks better proportionally. The height of 2.44 m is sufficient for housing and offices.
What is the typical age of a 20G1 container on the market?
Containers are usually used for 10–15 years. Older containers (20+ years) are cheaper, but may have corrosion problems. New containers are more expensive, but have a longer service life.
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