Complete Buying Guide: How to Choose a Used 20-Foot Shipping Container (Dry)

Why choose a used 20-foot shipping container?

The used 20-foot Dry shipping container has become a go-to solution for storage and transport. Its popularity rests on a rare balance: generous internal volume (about 33 m³), a small footprint (6.06 m x 2.44 m), and a low purchase cost. For individuals and professionals alike, it is often the most rational alternative to traditional permanent storage or warehouse rental.

Choosing used is also an economic and ecological decision. A refurbished, leak-tested container offers effective protection against weather and dust for a fraction of the new price. Moreover, by extending the life of an already-manufactured industrial asset, you are reusing it and avoiding the production of a new container and its associated energy. A well-maintained container can serve for decades in static storage, and its Corten steel is fully recyclable at end of life.

This guide walks you step by step through choosing a used 20-foot Dry container. We will cover the technical specifications to know, inspection points, suitable uses, regulatory and logistical aspects, and maintenance tips to maximize your investment.

Technical specifications of a 20-foot Dry container

Before buying, it is essential to understand the standard specifications of a 20-foot Dry container. These benchmarks will help you verify listings and adapt your project.

Dimensions and volume

A standard 20-foot Dry container meets ISO 668 for external dimensions: about 6.06 m long, 2.44 m wide, and 2.59 m high. Inside, usable dimensions are about 5.90 m long, 2.35 m wide, and 2.39 m high. Usable internal volume is therefore close to 33 m³. These dimensions are standardized, ensuring universal compatibility with handling equipment and ships.

Structure and materials

The structure is made of Corten steel, a weathering steel containing copper, chromium, and nickel. These alloying elements allow a protective oxide layer to form on the surface, slowing corrosion. Side walls are corrugated steel, the roof is slightly curved to shed water, and the floor is 28 mm marine plywood, treated to resist moisture and rolling loads. The rear doors are double doors fitted with container locks and rubber seals.

Weight and payload

The tare weight of a 20-foot Dry container is generally between 2,200 and 2,400 kg depending on the manufacturer and reinforcements. The maximum allowed payload is about 28,000 kg, but it depends on the maximum gross weight (MGW) shown on the CSC plate attached to the door. These limits must be respected for safety and transport compliance.

Standards and certifications

Shipping containers are governed by several standards: ISO 668 for dimensions, ISO 1496-1 for technical specifications and testing, and the CSC plate (Convention for Safe Containers) which certifies transport compliance. The CSC plate must be legible and up to date. It shows the date of the last periodic examination and the maximum allowed weight.

Key inspection points before buying

When buying a used container, a thorough inspection is essential. Here are the items you must check.

Structural condition

Inspect the walls, roof, and frame for perforating rust, major deformation, or non-professional repair welds. Light surface oxidation is normal on a container that has sailed, but it must not have pierced the steel. A refurbished container guaranteed Wind & Watertight has been checked on these points.

Floor

The marine plywood floor must be sound, with no soft spots, rot, or holes. A degraded floor compromises load safety and encourages moisture. Also check for mold or persistent odors.

Doors and sealing

The rear double doors must open and close without forcing. Locks and locking bars must slide easily. Rubber seals must be flexible, complete, and free of cracks or permanent compression. A faulty seal compromises air and water tightness. The Wind & Watertight guarantee specifically covers these points.

CSC plate and markings

The CSC plate, mandatory for sea transport, must be legible and up to date. The identification marking (owner code, serial number, country code, type) allows the container's history to be traced. Maximum gross weight, tare weight, and payload are shown on the door. A container without a legible CSC plate can cause problems for export.

History and cleanliness

Ask about previously transported goods. A container that held dangerous or food products must have been cleaned to standards. For export use, a cleaning certificate may be required by the carrier or destination country. A clean, dry, odor-free container is essential.

Uses of a 20-foot Dry container

The 20-foot Dry container is versatile. Here are the main uses it can serve.

Static storage

This is the most common use. It stores construction equipment, tools, furniture, archives, seasonal stock, agricultural or leisure equipment. Its compact size makes it easy to place, even on small plots. It effectively protects against theft, weather, and dust, provided it is properly closed and maintained.

Conversion into a technical room or office

With insulation, ventilation, and electrical work, a 20-foot container can be converted into a site office, technical room, workshop, or changing room. 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 access, workplace), additional requirements apply, and it is wise to consult a building professional.

Export and sea transport

The 20-foot Dry container is the reference for shipping general cargo. It is accepted by all shipping lines and handled by all equipped ports. Before any export, check that the CSC plate is valid and that the container is clean, dry, odor-free, and free of residues from previous goods. Customs authorities and carriers may refuse a non-compliant or poorly maintained container.

Comparing container formats and types

The 20-foot Dry is not the only option. Here is how it compares to other formats and types.

20-foot vs 40-foot

The 40-foot Dry offers about double the volume (nearly 67 m³) for a price often less than double that of a 20-foot. However, it requires more ground space and more powerful handling equipment. The 20-foot is easier to place and more maneuverable.

High Cube and other heights

The 40-foot High Cube gains about 30 cm of internal height, which is valuable for storing tall items or for interior fit-out. A 20-foot High Cube also exists, rarer, with the same length but greater height. Conversely, 10-foot or 8-foot containers are more compact and easier to fit in urban settings, but their cost per cubic meter is generally higher.

Specialized types: Reefer, Open Top, Flat Rack, Tank

The Reefer container (refrigerated) is insulated and equipped with a refrigeration unit for perishable goods. The Open Top container has a removable roof for loading tall items. The Flat Rack container has no side walls or roof, designed for heavy or bulky loads. The Tank container is a tank for liquids. For everyday storage or shipping of dry goods, the standard Dry, especially the 20-foot, remains the simplest and most economical choice.

Regulations and transport

Buying and installing a 20-foot container in France involves a few practical rules.

Transport and handling

A 20-foot container weighs over two tonnes empty: it cannot be moved without suitable equipment, such as a crane truck, a high-capacity forklift, or a container truck with a hydraulic arm. Delivery must be prepared: sufficient access, stabilized 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 dimensions.

Planning and installation

For placement, check local planning rules: in some municipalities, a container used as a permanent structure 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. Also, if the container is intended for public access or workers, the safety and hygiene rules applicable to workplaces apply.

Maintenance and durability

A well-maintained used shipping container can serve for decades. Here are some tips to extend its life.

Regular cleaning

Cleaning with fresh water and mild soap removes salt deposits and pollutants, especially near the sea. Avoid overly powerful pressure washers on seals and rust areas.

Corrosion treatment

For small corrosion touch-ups, brushing followed by an anti-rust paint suitable for Corten steel extends life. It is also advisable to lightly grease door locking mechanisms and hinges.

Moisture prevention

If the container remains on the ground, ensure it rests on stable supports (concrete blocks, wooden beams) to avoid direct contact with ground moisture and allow air circulation under the floor. Even minimal ventilation limits condensation inside. Finally, periodically check the roof and seals for water tightness, especially after strong winds or hail.

Budget and return on investment

The price of a refurbished used 20-foot Dry container guaranteed Wind & Watertight is generally between €1,200 and €2,000, depending on condition, availability, and delivery options. This price positioning corresponds to a container ready for storage or export. Compared to renting storage space, buying quickly becomes profitable: a container can be resold or moved as needed. Moreover, its ISO standardization ensures compatibility with handling equipment and ships, simplifying logistics and preserving resale value.

Used 20-foot container: mistakes to avoid

Even with a controlled budget, a hasty purchase can turn into a bad deal. Here are the most common pitfalls on the used market, and how to avoid them.

Buying without a physical inspection

Listing photos never show everything. A container can look flawless online and reveal, on delivery, perforating rust under the chassis, a floor softened by moisture, or hardened door seals. If you cannot travel, ask for additional targeted photos: bottom of the frame, corners, inside roof, floor near doors, CSC plate close-up. A serious seller will respond without difficulty.

Confusing "watertight" with "like new"

A used container guaranteed Wind & Watertight is watertight and windtight, but it retains marks of its history: scratches, small dents, surface oxidation, traces of previous repairs. These defects do not affect its primary function. However, if you want impeccable aesthetics for a visible use (reception, storefront), budget for repainting or choose a one-trip container, more expensive but nearly new.

Neglecting delivery site accessibility

On delivery day, a crane truck or container truck needs sufficient maneuvering space. A narrow gate, low branch, tight turn, or soft ground can prevent drop-off or even damage the container. Plan ahead by measuring access, checking ground bearing capacity, and informing the carrier of the context. A failed delivery often results in extra costs.

Underestimating additional costs

The advertised price is not always the final cost. Add transport, handling, possible shoring (concrete blocks, beams), fit-out work if you convert the container, and sometimes planning permission. Compare quotes on a total basis, not just the bare container price.

New, one-trip, or used container: which choice for which need?

The market offers three main categories of Dry containers, with significant price and quality differences.

New container

Recently manufactured, it has never or barely sailed. Its paint is intact, seals new, floor impeccable. It is the choice for projects where aesthetics matter, or when the container must be converted (opening bays, insulation). The extra cost compared to used is clear.

One-trip container

It has made a single voyage from its factory, often from Asia. It is very close to new, with some handling marks. Its price is between new and classic used. It is a good compromise for those who want a clean container without paying the new price.

Refurbished used container

This is the most economical option. It sailed for several years, then was inspected, cleaned, and guaranteed watertight. Its aesthetic defects are accepted, but its function is preserved. For storage, construction, or export, it offers the best value for money. This category includes the 20-foot Dry model offered at €1,350.00.

Preparing your container before use

Once the container is delivered, a few simple steps optimize its use and lifespan.

Check on receipt

On delivery, open and close the doors, inspect seals, check the CSC plate, inspect the floor, and look for any damage during transport. Immediately report any anomaly to the carrier or seller.

Basic interior fit-out

For organized storage, add shelves, hooks, or rails. If you store moisture-sensitive products, place passive dehumidifiers (silica gel packs) and raise boxes on pallets to avoid direct contact with the floor.

Security

A closed container is already a deterrent, but a quality padlock, or even an additional security lock, reinforces protection. Avoid storing high-value items unattended, and note that keeping contents discreet limits risk.

Conclusion

Choosing a used 20-foot Dry shipping container requires method. By checking dimensions, structural condition, floor, doors, CSC plate, and history, you ensure a durable investment. This versatile format meets many uses, from static storage to export, including conversion into a technical room. With minimal maintenance, it offers a volume-to-price ratio hard to match. Feel free to contact us to find out available models, arrange a visit, or get a transport quote.