Used 20ft Shipping Container (Dry): Uses, Modifications and Fit-Out Options

Why choose a used 20ft Dry container?

The used 20ft Dry shipping container, often called EVP or TEU (Twenty-foot Equivalent Unit), is standardised, proven equipment. Its design complies with ISO 668 and ISO 1496-1, ensuring dimensions and strength compatible with global transport infrastructure. A refurbished, watertight-tested unit (Wind & Watertight guarantee) provides reliable protection against weather and dust at a fraction of the cost of a new container.

This type of container is popular for several reasons:

• Usable volume: around 33 m³, ideal for storing equipment, archives, goods or site gear.
• Durability: self-weathering Corten steel structure, 28 mm marine plywood floor, corrugated walls and curved roof.
• Compatibility: accepted by all shipping lines and handled by all equipped ports.
• Price: a refurbished used 20ft container is offered at around €1,350, a volume-to-price ratio hard to beat.

Before buying, it is essential to understand the technical specifications and key points to make the right choice.

Technical specifications of the 20ft Dry container

A standard 20ft Dry container meets precise dimensions defined by ISO 668. Here are the common measurements:

• External dimensions: approx. 6.06 m long, 2.44 m wide and 2.59 m high.
• Internal dimensions: approx. 5.90 m long, 2.35 m wide and 2.39 m high.
• Internal volume: approx. 33 m³.
• Tare weight: generally between 2,200 and 2,400 kg depending on manufacturer and reinforcements.
• Maximum payload: approx. 28,000 kg, but depends on the maximum gross weight (MGW) shown on the CSC plate.

The structure is made of Corten steel, a self-weathering steel containing copper, chromium and nickel. This composition allows it to develop a protective oxide layer that slows corrosion. The 28 mm marine plywood floor easily supports trolleys, pallets or suitable handling equipment. The rear doors are double doors fitted with container locks and rubber seals. On a used container, these seals are wear points to check: a supple seal, without cracks or permanent crushing, ensures watertightness.

The CSC plate (Convention for Safe Containers) is mandatory for sea transport. It shows the date of the last periodic examination and the maximum authorised weight. Make sure it is legible and up to date if you intend to export the container.

Common uses of the used 20ft Dry container

Thanks to its compact size and modularity, the 20ft Dry container fits many contexts. Here are the most frequent uses.

Static storage

This is the most widespread use. The container offers secure space, protected from theft, weather and dust. It is used for:

• Site equipment, tools, PPE.
• Furniture, archives, seasonal stock.
• Agricultural or leisure equipment.
• Various goods awaiting shipment.

Its compact size makes it easier to install than a 40ft, especially on urban land or tight plots.

Base for fit-out

The 20ft container can be converted into a site office, technical room, workshop, changing room, or even modular housing after works. However, a Dry container is not designed to be habitable as is: without insulation or ventilation, condensation and temperature swings make it uncomfortable. For regulated use (public reception, workplace), additional requirements apply and it is wise to consult a building professional.

Export and sea transport

The 20ft Dry container is the benchmark for shipping various goods. It is accepted by all shipping lines and handled by all equipped ports. Before any export, check that the container has a valid CSC plate. It must be clean, dry, odour-free and free of residues from previous goods, especially if it carried food or dangerous products. Customs authorities and carriers may refuse a non-compliant or poorly maintained container.

Sector-specific uses

Several sectors commonly use the 20ft Dry container:

• Construction and public works: storage of tools, materials and equipment on sites; its mobility allows it to be moved from one site to another.
• Agriculture: storage of seeds, fertilisers, machinery parts and crops protected from moisture and rodents.
• Trade and logistics: storage annex or dispatch unit.
• Local authorities and associations: storage of event, sports or cultural equipment.
• Individuals: furniture, archives, leisure vehicles or bulky items.

Possible modifications and fit-outs

The 20ft Dry container is an ideal base for many fit-outs. Here are the most common modifications, with key points to respect.

Insulation and thermal comfort

For prolonged use, insulation is essential. Without it, the container undergoes strong temperature variations and condensation. Common solutions:

• Mineral wool: efficient and economical, but requires a vapour barrier to prevent moisture.
• Rigid panels (polyurethane, extruded polystyrene): easier to install, good thermal resistance.
• External insulation: possible, but be careful not to create thermal bridges.

It is also advisable to add an overlay floor (e.g. OSB or plywood) to improve comfort and protect the original floor.

Ventilation and condensation protection

Condensation is the number one enemy of a fitted-out container. To limit it:

• Install natural ventilation (high and low vents) or mechanical (MVHR).
• Use a vapour barrier on the warm side.
• Avoid moisture sources inside.
• Raise the container on blocks to allow air circulation under the floor.

Electricity and lighting

For office, workshop or housing use, a compliant electrical installation is required. Call a qualified electrician to:

• Drill through walls without compromising watertightness (use waterproof cable glands).
• Install a distribution board, sockets and suitable lighting.
• Earth the entire metal structure.

Openings: doors, windows, glazed bays

Cutting an opening in a container is a delicate operation. It must be reinforced with a welded metal frame to maintain structural rigidity. It is recommended to entrust this work to a professional, as a poorly made cut can affect strength and watertightness. Common openings:

• Service door or French door.
• Fixed or opening windows.
• Glazed bays for a commercial premises or office.

Roof and additional protection

A container roof is slightly curved to drain water. For a fit-out, you can add:

• An overlay roof (steel sheet, shingle) to improve insulation and watertightness.
• Sun protection (shade sail) to reduce heat.
• Additional waterproofing if the roof shows signs of corrosion.

Partitions and interior fit-out

To divide the space, lightweight partitions can be installed (metal frame + plasterboard or particle boards). This allows several rooms to be created: office, sanitary facilities, storage area. Be careful not to overload the floor and to respect permissible loads.

Heavy modifications: habitable container

Converting a 20ft container into housing requires a thorough study: reinforced insulation, efficient ventilation, electrical and plumbing installation, joinery, etc. Local planning rules must also be checked. In some municipalities, a container used as a permanent construction may require a building permit. A container simply placed and used as temporary storage is not always subject to the same obligations, but it is wise to check with the planning department.

Points to check before purchase

When buying a used container, several points deserve your attention:

• Structure: look for perforating rust, major deformations, non-professional repair welds. Slight surface oxidation is normal, but it must not have perforated the sheet metal.
• Floor: check it is not rotten, with no soft areas or holes. A sound floor is essential to support loads and prevent moisture.
• Doors: they must open and close without forcing, locks must slide, and seals must be supple and complete.
• CSC plate: examine it to know the tare weight, payload and date of last inspection. A container without a legible CSC plate can cause problems for transport.
• Markings: the owner code, serial number and country code allow the container's history to be traced.

If you buy for professional use, ask for an invoice mentioning these elements, as well as the container's condition. For export use, ensure the container has not carried dangerous goods without appropriate cleaning.

Care and maintenance

A shipping container requires little maintenance, but a few regular actions extend its lifespan:

• Cleaning: with clean water and mild soap, to remove salt deposits and pollutants, especially near the sea. Avoid overly powerful pressure washers on seals and rust areas.
• Corrosion touch-ups: brush and apply anti-rust paint suitable for Corten steel.
• Lubrication: lightly grease door locking mechanisms and hinges.
• Supports: place the container on concrete blocks or wooden sleepers to avoid direct contact with ground moisture and allow air circulation.
• Ventilation: even minimal, it limits condensation inside.
• Watertightness check: periodically check the roof and seals, especially after strong wind or hail.

Transport and installation

A 20ft container weighs over two tonnes empty: it cannot be moved without suitable equipment (crane truck, high-capacity forklift, container truck with hydraulic arm). Delivery must be prepared: sufficient access, stabilised ground, no overhead lines or obstacles. On public roads, transport is subject to regulations on vehicle weights and dimensions; an exceptional convoy may be necessary depending on the route and size.

For installation, check local planning rules. In some municipalities, a container used as a permanent construction or storage may require planning permission. A container simply placed and used as temporary storage is not always subject to the same obligations, but it is wise to check with your local planning department. Furthermore, if the container is intended to receive the public or workers, the safety and hygiene rules applicable to workplaces apply.

Comparison with other container formats and types

To choose the right container, it is useful to compare formats and types:

• 20ft Dry: moderate volume (33 m³), easy to install, controlled budget. Ideal for general use.
• 40ft Dry: around 67 m³, often priced less than double a 20ft, but requires more ground space and more powerful handling equipment.
• 40ft High Cube: around 30 cm extra internal height, valuable for storing tall items or fitting out.
• 20ft High Cube: rarer, same length but greater height.
• 10ft or 8ft: more compact, easy to integrate in urban areas, but higher cost per cubic metre.
• Reefer: insulated and fitted with a refrigeration unit, for perishable goods or temperature-sensitive products. Consumes energy and costs more.
• Open Top: removable open roof or tarpaulin, for loading tall or bulky items from above.
• Flat Rack: platform without walls or roof, with folding sides, for heavy or bulky loads.
• Tank: tank within an ISO frame, for liquids.

For general use of storing or shipping dry goods, the standard Dry, and in particular the 20ft, remains the simplest and most economical choice.

Conclusion

The used 20ft Dry shipping container is a versatile, robust and economical solution. Whether for storage, transport, or as a base for fit-out, it offers an excellent volume-to-price ratio. Its ISO standardisation guarantees compatibility with handling equipment and ships, simplifying logistics operations. With minimal maintenance, it is a durable and scalable investment that you can move, resell or modify as needed.

Offered at €1,350.00, this refurbished, watertight-tested container is ready to use. Contact us to find out about available models, arrange a visit or obtain a transport quote.