New 40ft Shipping Container: Uses, Conversions and Fit-Out Options

The new 40ft shipping container: a versatile piece of equipment

The new 40ft shipping container in Corten steel is a closed unit built to ISO 668 and ISO 1496-1 standards. It offers a floor area of about 28 m² and a usable volume of about 67 m³. Its sturdy structure and weathertightness make it a popular choice for storage, transport and modular fit-out. At Transport Hosni Conteneur in Marseille, this model is supplied new, overhauled, with a 28 mm marine plywood floor and double rear doors with locking bars.

Main uses of a new 40ft container

Secure, organised storage

With 67 m³, the 40ft container can store large volumes: building materials, furniture, archives, site equipment, palletised goods. Its length allows zoning, for example a central aisle with two rows of pallets on either side, or metal shelving along the full depth. The 28 mm marine plywood floor supports high concentrated loads, but heavy loads should be spread over bearers or load-spreading plates to avoid local punching.

Access is only from the rear on a standard dry container, so sufficient manoeuvring space is needed in front of the doors. For long-term storage, ventilation is recommended to limit condensation: leave the doors slightly ajar or fit ventilation grilles. A dehumidifier or absorbent sachets can help in humid regions.

Transport of dry goods

ISO-compliant, the new 40ft container is suitable for sea, road and rail transport. Its CSC plate certifies compliance and shows the maximum gross mass, tare mass, payload and date of the next periodic examination. For transport use, this plate is essential. The dry container is intended for dry goods: pallets, boxes, machinery, materials. It is not suitable for perishable goods (unless fitted with a refrigeration unit) or liquids.

The tare weight of a standard 40ft container is around 3.7 to 3.9 tonnes, and its maximum payload is around 28 tonnes depending on the model. These values are orders of magnitude: refer to the CSC plate for exact data. Transporting an empty 40ft container can be done on a suitable container truck, usually a flatbed semi-trailer or a container chassis. Depending on total weight, height and route, a movement permit may be required.

Site office, workshop and technical room

The 40ft container offers a floor area of about 28 m², enough for several workstations, a meeting area or a workshop. For a site office, thermal insulation, interior lining, compliant electrical installation and ventilation are required. A bare steel container is an excellent thermal conductor: it heats up quickly in the sun and cools down at night. Interior walls can be lined with insulating panels and wood or plasterboard facing, and the floor can receive a suitable floor covering.

For a workshop, the fit-out can include workbenches, wall storage, enhanced lighting and air extraction if work generates dust or fumes. A technical room can house electrical or plumbing equipment, provided safety rules are met and suitable ventilation is provided.

Modular housing and living space

The 40ft container can be converted into compact accommodation: studio, spare bedroom, independent office. The fit-out requires effective insulation, a compliant electrical installation, ventilation and often cutting openings for windows and an extra door. These modifications must be carried out by a professional to preserve the structure's rigidity. The 40ft High Cube, with its extra interior height of about 30 cm, is often preferred for housing, as it allows ceiling insulation without excessively reducing headroom. The standard 40ft remains suitable for compact housing or a workspace.

Retail and events

The 40ft container easily becomes a pop-up shop, exhibition stand, ticket office or sales unit. Its sturdiness and industrial look can be highlighted or concealed with cladding. For commercial use, an electrical installation, lighting, sometimes air conditioning, and compliance with accessibility and safety rules for public buildings are required.

Conversions and fit-outs: what you need to know

Thermal insulation and comfort

Corten steel conducts heat and cold. For office, workshop or housing use, insulation is essential. Walls, ceiling and floor can be insulated with insulating panels (mineral wool, polyurethane, wood fibre) and interior lining. External insulation is also possible, but it changes the container's appearance. Ventilation is essential to avoid condensation and renew air: a single-flow or dual-flow MVHR can be installed.

Openings: windows and doors

Cutting openings in a container affects its rigidity. It is advisable to call on a professional who will reinforce the opening frames with welded or bolted metal profiles. Windows can be PVC or aluminium, with double glazing for insulation. An extra door can be added on the side or front, but it must be properly sealed. For storage use, it is often enough to keep the original rear doors and add ventilation.

Electricity and plumbing

A compliant electrical installation is necessary for lighting, sockets and equipment. It is advisable to call on a qualified electrician. Cables can be fixed to walls with surface-mounted conduits or recessed in the insulation. For plumbing, if the container is used as housing or a room with a water point, a water supply and drainage are required. The floor can be drilled for drainage, but waterproofing and frost protection must be ensured.

Coverings and finishes

The marine plywood floor can be covered with a suitable floor covering: PVC, laminate, tiles (with a rigid underlay). Interior walls can be painted or lined with wood panels, plasterboard or PVC. For a warmer look, wood cladding can be used. The exterior can be painted to customise the container, but a paint suitable for metal must be used and the surface prepared.

Accessories and equipment

Many accessories can improve comfort and functionality: shelves, hooks, LED lighting, reinforced lock, awning above the doors, access ramp, air conditioning, heating. For storage use, full-height metal shelving optimises space. For an office, lightweight partitions can create separate areas. All these fit-outs must respect the structure and not compromise the container's weathertightness or rigidity.

Preparing the container installation

Choosing and preparing the ground

A loaded 40ft container can exert significant pressure at the four corner castings. It is recommended to place the container on concrete pads, timber sleepers or suitable foundations, to spread the load, prevent sinking and limit direct contact with ground moisture. A slight excavation or slope prevents water pooling under the container. Check the ground type: soft soil may require deeper foundations.

Delivery and unloading

Unloading a 40ft container requires lifting equipment capable of lifting several tonnes and manoeuvring on a stable surface. For an individual or small business, it is often simpler to entrust delivery and positioning to a specialist carrier with the right truck and crane. Prepare access: passage width, clear height, load-bearing ground. A convoy may require a movement permit depending on total weight, height and route.

Regulations and planning

For storage or housing use, check with the town hall on planning rules. In some municipalities, installing a container on the ground may be considered a construction and require prior declaration, especially if fitted out as a living or working space. Rules vary by zone, installation duration and land type. For professional use, it is advisable to call on qualified companies for fit-out and compliance.

Routine maintenance of a new 40ft container

Maintenance of a Corten steel container remains limited. Inspect the whole structure once or twice a year, paying particular attention to corners, welds, lower walls and around the doors. Clean with clear water and a broom, with a mild detergent if needed. Avoid overly powerful pressure washers that can damage seals and paint. After cleaning, let it air dry.

EPDM rubber door seals can be cleaned with a damp cloth and protected with a silicone-based product to keep them supple. A hardened or cracked seal must be replaced. Lubricate locks and hinges with a suitable grease. For a deep scratch reaching the metal, touch up with anti-rust paint. Surface rust marks, brown-orange in colour, are normal on Corten steel and do not mean the structure is perforated. However, deep rust, a soft floor, holes in walls or deformed corner posts should be a warning.

Comparison with other container formats and types

The standard 40ft shares the same width and external height as the 20ft, but doubles its usable length. The 20ft, with an internal volume of about 33 m³ and a floor area of about 14 m², remains the most widespread format for sea transport and the most manageable on a cramped site. The 40ft is better suited to large volumes or fit-outs requiring a comfortable habitable length.

The 40ft High Cube, with an external height of about 2.89 m instead of 2.59 m, adds about 30 cm of internal height. This extra height is appreciated for modular housing, mezzanines, tall shelving and transporting bulky but light goods. The standard 40ft, the subject of this article, offers an internal height closer to that of a 20ft container and remains perfectly suited to storing and transporting standard pallets.

Other container types exist: reefer (refrigerated), open top (open roof), flat rack (no side walls or roof), tank (liquids). The 40ft dry container has no refrigeration unit, no open roof, no removable walls: it is a closed, sturdy and versatile unit that covers most dry goods storage and transport needs.

New or used container: which to choose?

A new container has the advantage of a structure without repairs, an unstained floor and seals in good condition, which limits the risk of leaks and short-term maintenance costs. A used container may be cheaper to buy, but its condition varies widely and requires careful examination. The choice between new and used depends on the intended use, desired storage duration and available budget. For a fit-out as an office or housing, a new container offers a healthier and easier base to convert.

Points to check on delivery

When receiving a new container, check the presence of the CSC plate, the absence of perforating rust, the suppleness of seals, easy opening of doors and the condition of the floor (no splinters or delamination). Ask for recent photos before purchase. Make sure the container has not been exposed to dangerous goods or chemicals: a container that has carried toxic products may retain residues and be unsuitable for food or housing use without thorough cleaning. Check door alignment and the condition of locks.

Sector-specific use cases

In construction and public works, the 40ft container serves as a site welfare unit, changing room, canteen or storage room. In industry and logistics, it provides a fast, secure extension of storage space. In agriculture, it can house equipment, seeds or crops, with suitable ventilation. In retail and events, it becomes a pop-up shop, stand or ticket office. In the cultural and non-profit sector, it becomes a workshop, rehearsal room or storage room. For individuals, it offers an extra storage solution for furniture, garden tools, light vehicles or leisure equipment.

Conclusion

The new 40ft Corten steel shipping container is a versatile, durable piece of equipment compliant with international standards. It suits storage as well as transport and fit-out as an office, workshop, technical room or modular housing. To make your project a success, check its condition on delivery, prepare its installation properly and regularly maintain its sealing and closing elements. At Transport Hosni Conteneur in Marseille, we offer this new 40ft container with a 28 mm marine plywood floor, double rear doors with locking bars and ISO compliance. Contact us for availability, delivery options and the exact specifications of the model offered.