At the beginning of container transportation, the structure and specifications of containers are different, which affects the circulation of containers in the world. It is urgent to formulate the world's general specifications for containers to facilitate the development of container transportation. The standardization of containers not only improves the versatility and interchangeability of containers as a transport unit in sea, land and air transportation, but also improves the safety and economy of container transportation and promotes the development of container multimodal transport in the world. Together, the standardization of containers also provides the basis for the selection, planning and manufacturing of container handling tools and loading and unloading machinery, so that container shipping becomes a matching, professional and efficient delivery system. Container specifications are divided according to the scope of use, and there are four types of world regulations, China's regulations, regional codes and company specifications.
Governments develop national container specifications by reference to world norms and taking into account their specific circumstances.
The external scale, limit error and additional components of various types of containers in China's current standard "Container External Scale and Extra Component" (GB1413-2008).
Such container specifications are based on regional arrangements based on the special circumstances of the area and such containers are only applicable to the area. Containers created according to container specifications established by the European World Railroad Union (VIC).
Some large container shipping companies,
Container shipping company specifications based on the company's specific conditions and conditions, such boxes are mainly used within the company's shipping range. Such as the United States Hailu company's 35ft container.