In a nutshell:
ISO 668 is an international standard for freight containers. It defines how common shipping containers are classified based on their external dimensions. It also includes specifications for maximum gross weights and selected minimum dimensions.
The standard technically refers to these containers as "Series 1 freight containers." This refers to internationally standardized containers for transport by ship, rail, and truck. This primarily includes the well-known 20-foot and 40-foot shipping containers.
ISO 668 primarily regulates the classification and external dimensions of internationally standardized freight containers. Furthermore, it contains specifications regarding their respective gross weights as well as selected minimum dimensions for the interior and door openings.
Uniform specifications ensure that containers can be loaded, stacked, and secured worldwide. They also facilitate the planning of ships, truck chassis, freight trains, cranes, and container terminals.
The standard distinguishes containers by their length and height. The most well-known sizes include 20-foot and 40-foot containers.
A standard 20-foot container is approximately 6.06 meters long on the outside. A 40-foot container measures approximately 12.19 meters. The uniform external width for these ISO containers is about 2.44 meters.
Height is also taken into account. A standard container is generally about 2.59 meters high. A High Cube container reaches approximately 2.90 meters.
The exact dimensions depend on the size class and the design of the container.
A container frequently changes modes of transport on its journey. For example, it is picked up by truck, loaded onto a train, and later transported by ship.
Uniform external dimensions ensure that the container fits the vehicles and handling equipment used. This allows containers to be transported, stacked, and secured worldwide.
Standardization also simplifies the calculation of storage space, the selection of suitable chassis, and the planning of transport routes.
ISO 668 contains selected minimum values for internal dimensions and door openings. However, the complete requirements for individual container types are set out in other standards.
The ISO 1496 series of standards is primarily relevant for the internal dimensions of specific container types. Actual dimensions may also vary slightly depending on the manufacturer, design, and equipment.
For planning storage space or loading volume, you should therefore always check the data sheet for the specific container.
ISO 668 primarily regulates the classification, external dimensions, and associated gross masses of containers.
ISO 1161, on the other hand, covers corner fittings. These so-called corner castings are located at the eight corners of an ISO container. They are used for lifting, stacking, and securing.
Both standards complement each other but govern different technical areas.
No. Standardized dimensions alone are not sufficient for approval for international sea transport.
For this, the container generally requires a valid CSC plate. This confirms that the container has been inspected and meets the applicable safety requirements.
A container can therefore comply with the dimensions of ISO 668 without currently being approved for international sea transport.
When converting a container, its weight, center of gravity, and stability can change. Large cutouts, additional doors, or heavy technical installations can affect the container's original properties.
If the converted container is to continue to be transported internationally, technical requirements must be considered at an early stage. Depending on the type and scope of the conversion, a re-inspection or CSC recertification may be required.
m³ plans individual container solutions from the initial design to the prototype or series production. Upon request, we also take into account the requirements for transport, installation, and further use.
ISO 668 is an international standard for the classification, dimensions, and maximum permissible gross masses of standardized freight containers.
"Series 1 freight container" is a technical term from ISO 668. It refers to internationally standardized transport containers, which primarily include the common 20-foot and 40-foot shipping containers.
The standard primarily defines the external dimensions of the containers. It also contains selected minimum values for internal dimensions and door openings.
Yes. ISO 668 takes various container heights into account. This includes size classes for high-cube containers.
No. The wall structure, doors, insulation, or technical installations can affect the internal dimensions. Therefore, the data sheet for the specific container is the deciding factor.
An ISO standard describes technical characteristics such as dimensions or components. The CSC plate, on the other hand, confirms the safety-related inspection of an individual container.