New 20ft Shipping Container (One Trip): Uses, Modifications and Fit-Out Options

What is a new 20ft "One Trip" shipping container?

A new 20ft shipping container, often called "One Trip", is a container used for a single cargo transport before being sold. It stands out from classic used containers by its near-flawless aesthetic and structural condition: very few scratches, no perforating corrosion, and full structural integrity. Manufactured to ISO 668 and ISO 1496 standards, it guarantees standardised dimensions and compatibility with international handling and transport systems.

This container is made of Corten steel, a low-alloy steel offering atmospheric corrosion resistance significantly higher than ordinary steel. Thanks to its chemical composition (copper, chrome, nickel, phosphorus), it develops a protective layer of surface rust that slows the progression of deep corrosion. This characteristic is essential for prolonged outdoor use, whether for storage, housing or any other application exposed to the weather.

The floor is made of 28 mm marine plywood, a dense, moisture-resistant material able to support heavy loads and frequent traffic. The side walls and roof are corrugated steel sheet, giving significant structural rigidity. The rear doors are double-leaf, fitted with container locks (four vertical locking bars) and EPDM rubber seals. These seals ensure water and air tightness, protecting the contents from weather and dust.

This container is fitted with a lockbox, a steel housing welded to the doors that protects the padlock against cutting or break-in attempts. It also has forklift pockets on the long sides, making handling by forklift easier without using hooks or slings.

Technical specifications and dimensions of the 20ft container

The standard dimensions of a 20ft container are: external length 6.058 m, external width 2.438 m, external height 2.591 m. Internal dimensions are approximately 5.898 m long, 2.352 m wide and 2.393 m high. Internal volume capacity is about 33.2 m³. Tare weight is generally between 2,200 and 2,400 kg, and maximum payload can reach around 28,000 kg, depending on the manufacturer's exact specifications. These values may vary slightly from one container to another, but they comply with ISO tolerances.

The standard colour of this container is RAL 5010 (blue) or RAL 7035 (grey), but other shades may be available on request. The paint is applied at the factory and provides additional corrosion protection. Note that even a new container may show slight scratches or handling marks, without affecting its structure or watertightness.

Common uses of the new 20ft container

Secure storage

Thanks to its watertightness and strength, the new 20ft container effectively protects against rain, dust and rodents. It can serve as secure storage for goods, tools, construction equipment or personal belongings. The lockbox and reinforced locks deter theft and make forcing more difficult.

Events

Its bright colour and new appearance make it an aesthetically acceptable element for public events. It is widely used as a stand, booth, ticket office or temporary storage space. Its modularity makes it easy to integrate into an event site.

Construction and industry

In the construction sector, it is often used as a site welfare unit: changing rooms, canteens, site offices or storage for sensitive equipment. In industry, it serves as a storage room for spare parts, consumables or chemicals (with the necessary safety fit-outs).

Retail and agriculture

In retail, it can be converted into a pop-up shop, drive-through or collection point. In agriculture, it is used to store crops, seeds or equipment, provided ventilation and rodent protection are included.

Possible conversions and fit-outs

The new 20ft container is an excellent base for conversion into a site office, technical room, workshop or even modular housing. Its rigid structure and standardised dimensions allow openings (doors, windows), insulation, electrical installation and plumbing to be fitted, subject to local construction and planning rules.

Office or technical room

Fitting out an office in a container requires thermal and acoustic insulation, ventilation, lighting and power sockets. Light partitions, a suspended ceiling and suitable flooring can be installed. For a technical room, specific ventilation and cable ducts should be provided.

Workshop

A workshop in a container must be equipped with effective ventilation to remove fumes and dust, as well as an electrical installation suited to the machines. The marine plywood floor can support heavy loads, but reinforcement is recommended if necessary.

Modular housing

Conversion into housing is common, but requires particular attention to thermal insulation and ventilation to avoid condensation. Adding windows, an entrance door, a bathroom and a kitchen involves plumbing and electrical work. It is advisable to use professionals to ensure compliance with building standards.

Checks before buying

When buying a new "One Trip" container, it is advisable to check certain points. First, make sure the container has its CSC plate (Convention for Safe Containers), which certifies compliance with international safety standards. This plate must be valid and up to date. Then inspect the door seals: they must be supple, free of cracks or tears, and in good contact with the structure. Also check the condition of the floor: it must not show soft areas, delamination or holes. The walls and roof must be free of perforations or major deformation. Finally, check that the locks and door handles work properly.

A new container is generally delivered with a watertightness certificate and may be subjected to a light test to verify the absence of leaks. It is recommended to ask the seller for these documents.

Transport and installation

In France, transporting a shipping container is subject to road haulage regulations. A 20ft container can be transported on a container truck or a suitable trailer. The vehicle's gross combination weight (GCW) and payload must be respected. For an abnormal load, a prefectural permit may be required if dimensions or weight exceed regulatory limits. As a general rule, a 20ft container falls within standard transport norms, but it is advisable to check with the carrier.

For ground installation, it is important to provide stable, level ground. A container can be placed on concrete blocks, wooden beams or metal feet, to avoid direct contact with the ground and limit moisture. A gap of at least 50 cm between the container and the ground is recommended to allow air circulation and prevent corrosion from below. If the container is to remain permanently in place, it can be anchored to the ground, especially in wind-exposed areas.

Maintenance of a Corten steel container

Maintaining a Corten steel container is relatively simple. Regularly wash the walls with clean water and mild soap to remove salt, dust and pollution deposits, which can accelerate corrosion. Avoid overly powerful pressure washers that could damage the seals or paint. Inspect the door seals annually and replace them if necessary. Check for rust spots and treat them with a suitable anti-rust paint. Grease the hinges and locking mechanisms to ensure they work properly. If the container is used to store moisture-sensitive products, it is recommended to install a dehumidifier or desiccant bags.

To go further with maintenance, a distinction should be made between preventive and corrective maintenance. Preventive maintenance consists of protecting the container before damage appears: applying protective wax to painted walls, checking for water accumulation on the roof, and maintaining sufficient internal ventilation to avoid condensation. Corrective maintenance is carried out when damage is found: removing surface rust with a wire brush or sandpaper, then applying an anti-rust primer and a topcoat. For small scratches, a paint touch-up pen may be enough. It is also recommended to periodically check the condition of welds and reinforcements, especially if the container has suffered impacts during handling. Forklift pockets, although robust, should be inspected for possible cracks. Finally, if the container is exposed to a marine environment (near the sea), more frequent rinsing with fresh water is necessary to remove salt, which accelerates corrosion.

Regulations and compliance

A new shipping container must comply with ISO 1496-1, which defines the design, construction and testing specifications for series 1 containers. The CSC plate is mandatory for any container used in international transport. In France, using a container as a storage room or office may require planning permission if installed permanently. It is advisable to check with the local town hall for local rules (prior declaration, building permit, etc.).

Regarding transport regulations in France, several points deserve clarification. Transporting a 20ft container is generally done by a container truck, whose total length must not exceed 16.50 m for a standard road train. The gross combination weight (GCW) is 40 tonnes for an articulated vehicle, and the payload is around 25 to 28 tonnes depending on the vehicle. A new 20ft container weighs about 2.3 tonnes empty, leaving a significant margin for loading. However, if the container is transported with goods, care must be taken not to exceed axle weight limits. For abnormal loads, prior authorisation is required from the DREAL (Regional Directorate for Environment, Planning and Housing) if the convoy exceeds 16.50 m long, 2.55 m wide or 4.00 m high, or if total weight exceeds 40 tonnes. A standard 20ft container complies with width (2.438 m) and height (2.591 m) limits, but its 6.058 m length may require specific securing. It is also important to comply with the rules for wedging and securing containers on vehicles, in accordance with Articles R.312-1 et seq. of the Highway Code. The carrier must ensure the container is locked onto the truck chassis using twist-locks, which are standardised devices. Finally, if the container is imported or exported, it must be declared to customs and may be subject to phytosanitary checks, especially if it contains untreated wood products.

Comparison with other container types

Compared with other container sizes and types, the new 20ft has advantages and disadvantages. Versus the 40ft, it is more manoeuvrable, lighter, and can be transported more easily, including on difficult-access sites. Its internal volume of 33.2 m³ is sufficient for many uses, but it is half that of a 40ft (about 67 m³). The 20ft is also better suited to storing heavy, dense loads, because its lower tare weight allows more payload than a 40ft. On the other hand, for housing or office use, the 40ft offers more space and may be more economical per square metre.

Versus the 10ft, the 20ft offers double the volume and better modularity, but it is bulkier and requires more ground space. The 10ft is often used for small storage or kiosks, but it is less common and may be more expensive per cubic metre. Versus the 20ft high cube, which has an internal height of about 2.69 m (i.e. 30 cm more), the standard 20ft is more limited in height, which can hinder the installation of partitions or suspended ceilings. The high cube is preferred for housing or offices, but it is slightly more expensive and can cause transport height issues (especially when passing under structures). Versus the open top container, which allows top loading, the standard 20ft dry is more watertight and better suited to routine storage. The open top is reserved for out-of-gauge loads. Versus the flat rack, which has no side walls, the 20ft dry offers full protection. Finally, versus the reefer container, which is insulated and fitted with a refrigeration unit, the 20ft dry cannot control temperature, but it is much cheaper and simpler to maintain.

Conclusion

The new 20ft "One Trip" shipping container is a versatile, robust and attractive product, suitable for many uses. Its Corten steel, marine plywood floor and safety equipment make it a durable choice for storage, events or conversion. Before buying, it is essential to check its condition and certificates, and to plan transport and installation arrangements. With minimal maintenance, it can serve for many years.