Complete Buying Guide: How to Choose a Modular Laboratory Container (Shelter)

Why choose a modular laboratory container (shelter)?

The modular laboratory container, also called a shelter, turns a standard shipping container into a scientific or technical workspace. Unlike a classic site cabin, it is based on a Corten steel structure designed to withstand the stresses of sea transport and demanding industrial environments. This base gives it structural rigidity and durability far superior to those of lightweight modules, with a service life generally estimated at several times that of a standard cabin.

This type of shelter is aimed at companies that need a mobile, relocatable technical unit that can be operational quickly, without sacrificing a level of equipment suited to their processes. It is used in the chemical and oil industry, the pharmaceutical sector and the food industry, but also as a technical office, site meeting room or supervision unit for temporary industrial sites. The main advantage lies in mobility: the container can be moved from one site to another without rebuilding, which reduces costs and lead times when a project changes location.

Before buying, it is essential to understand the technical characteristics, the available formats and the fit-out constraints. This guide takes you step by step through defining your specifications and making the right choice.

Understanding the base: the shipping container as a structure

The laboratory shelter is built from an ISO shipping container. Its standard external dimensions are 6.058 m long, 2.438 m wide and 2.591 m high for a 20-foot model, or 12.192 m long for a 40-foot one. The useful internal height is about 2.39 m for a standard dry container, and about 2.69 m for a high cube version, which can be a selection criterion depending on the density of equipment to be installed.

The original floor is made of 28 mm marine plywood, laid on steel cross members, which provides a solid base for a technical covering. The walls, roof and uprights are made of Corten steel, a low-alloy steel that resists atmospheric corrosion better than ordinary steel. The double-leaf rear doors, fitted with container locks, ensure robust closing and wide access for installing equipment.

The structure complies with ISO 668 and ISO 1496 standards, which define the dimensions and strength requirements of shipping containers. CSC certification (Convention for Safe Containers) allows it to be transported by ship and truck as part of international trade. These elements guarantee not only the robustness but also the transportability of the shelter.

New or used container?

A new container offers a sound base and better control of watertightness. A used container may be suitable if its condition is checked: no perforating corrosion on the uprights, bottom cross members and roof, flatness of the floor, proper operation of the door locks. The choice depends on your budget and the expected service life of the shelter. For a laboratory intended to be moved often, a new container is generally preferable.

Available formats and their uses

The choice of format is decisive. It depends on the required surface area, the number of workstations and transport constraints.

• 20-foot container: about 33 m³ of internal volume and a floor area of about 14 m². It remains manoeuvrable, is transported on a standard truck and can be moved by common lifting equipment. This is the most common format for a small or medium-sized laboratory, with one or two work areas.
• 40-foot container: about 67 m³ and an area of about 28 m². It allows several functions to be separated: an analysis area, a sample preparation area, a technical room and a storage space. However, it requires heavier logistics and a larger host site.
• 40-foot high cube container: adds about 30 centimetres of internal height, which improves the routing of technical ducts in the ceiling and operator comfort.
• 10-foot container: rarer, it can suit a single sampling or inspection station, but its reduced volume limits fit-outs.

The choice therefore depends less on the purchase price than on the surface area actually needed, the number of workstations and transport constraints.

Laboratory shelter vs other types of containers

A distinction must be made between the laboratory shelter and other types of shipping containers:

• Standard dry container: a simple closed box, without insulation or internal equipment, for storing or transporting dry goods.
• Reefer container: fitted with a refrigeration unit and insulated walls, designed for transporting perishable goods and not for human occupation. Converting it into a laboratory is possible but rare, because the temperature control is designed for the cargo.
• Open top container: open roof, useful for loading tall objects, but less watertight and poorly suited to a technical unit.
• Flat rack container: no walls or roof, for transporting heavy or oversized loads.
• Folding container: designed to be folded when empty, it does not allow a fixed fit-out.

The laboratory shelter belongs to a category of its own: it uses the base of a dry or high cube container, but it is transformed into a complete workspace.

Interior fit-outs: a technical custom build

The interior fit-out is made to measure. It generally begins with thermal insulation of the walls, roof and floor, to limit heat exchange with the outside and allow temperature control. This insulation is particularly important for laboratories that must maintain stable conditions, whether for operator comfort or for sample preservation.

The interior walls can be clad with panels suited to the cleaning and chemical resistance requirements of the sector concerned. The floor can receive a resin coating with a drain, which makes cleaning easier and allows liquids to be drained in the event of an accidental spill. The workbenches are integrated with storage, drawers or cabinets, and the equipment is fixed to the structure to stay in place during movements.

The whole is designed so that the container remains movable: once the connections are disconnected, it can be lifted, loaded and transported like a standard shipping container.

Insulation and thermal control

The level of insulation depends on the use: a laboratory that must maintain a precise temperature (for example for sensitive analyses) will require reinforced insulation and a suitably sized air conditioning system. The power dissipated by the equipment and the number of occupants are key factors. Efficient insulation reduces energy consumption and improves comfort.

Floor and wall coverings

Resin floor covering with a drain is common for laboratories handling liquids. It must be resistant to the chemicals used and easy to clean. The walls can be fitted with laminate panels, PVC or stainless steel depending on the sector. In the food industry, smooth, washable surfaces are essential to avoid retention areas and facilitate disinfection. In the pharmaceutical industry, particulate cleanliness requirements impose materials compatible with cleaning protocols.

Workbenches, storage and equipment

The workbenches are custom-designed: length, height, number of stations, presence of sinks, drawers, cabinets. The equipment (fume hoods, microscopes, analysers) is fixed to the structure to withstand movements. It is essential to plan the location of the utilities (electricity, water, gas, compressed air) from the design stage.

Connections and installation

Commissioning requires planning the necessary connections. A laboratory container generally needs to be supplied with electricity, water and sometimes compressed air or technical gases. Wastewater drainage must be provided, especially when the floor is fitted with a drain. Ventilation or air conditioning must be sized according to the power dissipated by the equipment and the number of occupants. These elements must be defined upstream with the designer, because they determine the routing of utilities and the internal layout.

It is also advisable to provide sufficient access for lifting equipment and to check the load-bearing capacity of the ground at the installation site, since a 20-foot container weighs about 2.2 to 2.5 tonnes empty and can exceed several tonnes once fitted out and equipped.

Transport and regulations

From a regulatory standpoint, transporting a container by road in France is subject to the general rules applicable to vehicles and loads. A 20-foot container can be transported on a suitable container truck, with twist-locks for locking. The authorised gross vehicle weight, signage and any permits depend on the convoy and the dimensions. For sea transport, CSC certification and compliance with ISO standards are essential, and the container must have a valid approval plate.

When used as a workspace, it must comply with the general occupational safety and health rules applicable to professional premises, particularly regarding ventilation, lighting, electrical safety and emergency equipment. These points must be validated with the competent bodies according to the activity carried out.

Stacking and modularity

A laboratory shelter can be placed on the ground on blocks or lightweight foundations, which makes it easier to install on stabilised ground. It can also be integrated into an existing building, for example as an adjoining module, or stacked on another container when the structure allows it. Stacking requires checking the strength of the lifting corners and providing safe access. In some projects, several shelters are assembled to form a larger complex: laboratory, office, sanitary facilities and technical room. This modularity is one of the advantages of the container format, because it allows a complex to be expanded without rebuilding. However, it requires fine coordination of utilities between modules and careful sealing of the junctions.

Watch points when buying

Several points deserve particular attention before validating your project:

1. Structural condition of the base container: check for the absence of perforating corrosion on the uprights, bottom cross members and roof, the flatness of the floor, and the proper operation of the door locks.
2. Technical programme: precisely define the temperature to be maintained, the humidity level, the possible cleanliness class, the nature of the products handled and the available electrical power. These parameters determine the insulation, the air conditioning power, the type of floor covering and the safety equipment.
3. Transport constraints: a shelter intended to be moved often will not be designed in the same way as a fixed laboratory. Specify the frequency of movements and the available lifting equipment.
4. Lead time: producing a custom-fitted shelter requires design and manufacturing time that depends on the complexity of the fit-out and the availability of the equipment.
5. Budget: the cost depends on the format, the level of insulation, the coverings, the air conditioning, the number of workbenches and equipment, as well as transport constraints. Compare offers on the basis of precise specifications, asking for details of the equipment included and the connection services.

Maintenance and durability

Maintenance of a fitted laboratory container remains limited if the design is careful. The condition of the exterior paint should be checked regularly, particularly on the edges, the base and the areas exposed to impacts. Anti-corrosion paint touch-ups should be done without waiting for perforating rust to appear. The door and duct penetration seals must be checked to prevent infiltration. The ventilation or air conditioning system requires periodic maintenance: filter replacement, condensate checks, flow rate verification. The resin floor covering must be inspected to detect cracks or detachment, and the drain must be kept clean. Finally, the equipment fixed inside must be checked after each movement to ensure that no element has come loose.

Sector use cases: adapting the shelter to your activity

Requirements vary considerably depending on the sector:

• Chemical and oil industry: on-site analysis laboratory, sampling unit or quality control station. It must withstand corrosive atmospheres, which requires suitable floor and wall coverings, efficient ventilation and sometimes gas detection. On isolated sites or platforms, it must withstand severe climatic conditions, be energy self-sufficient and be able to be evacuated quickly.
• Food industry: microbiological analyses, raw material inspections or product development laboratories. Surfaces must be smooth, washable and resistant to cleaning products. The laboratory must be designed to avoid retention areas and facilitate disinfection.
• Pharmaceutical: modular cleanrooms, control areas or formulation laboratories. Requirements relate to the control of particles and cross-contamination: walls compatible with cleaning protocols, controlled air flows, validatable equipment.

In all these cases, the laboratory container must be thought of as a production tool and not as a simple room.

Conclusion: making your laboratory shelter project a success

The modular laboratory container is a suitable response to projects that require a robust, relocatable technical unit equipped according to precise specifications. Its shipping base guarantees resistance and transportability, while the interior fit-out makes it possible to achieve the level of functionality expected by the industrial, pharmaceutical and food sectors.

For a specific project, it is recommended to define the technical needs upstream and validate the feasibility with a designer experienced in fitted containers. The choice of format, the level of insulation, the coverings and the equipment must be defined according to the actual use and the site constraints. A well-prepared project, with clear specifications and an experienced designer, makes it possible to obtain a functional, durable shelter suited to the requirements of the sector.

Finally, using a laboratory container is part of a sustainable development approach when it extends the life of an existing shipping container. Converting a container into a technical unit avoids the construction of a new building and makes it possible to reuse an already manufactured steel structure. At the end of the project's life, the container can be moved, resold or repurposed. This approach is consistent with site practices that seek to limit waste and maximise the reuse of equipment. It nevertheless requires regular maintenance to guarantee the service life of the structure and the fit-outs.