ISO 668

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ISO 668 - Series 1 freight containers — Classification, dimensions and ratings is an ISO international standard which classifies intermodal freight shipping containers and standardises their size and weight specifications. Introduced in 1968, ISO 668 regulates both external and internal dimensions of containers, as well as the minimum door opening size, where applicable. It also specifies the associated gross weight ratings, and requirements for load transfer areas in the base structures of containers, since amendment 1 of 2005.[1]

The current edition of the standard is version E of 2013, which integrates version E from 1995 with its two amendments of 2005.


ISO designation * Common Name External dimensions Minimum internal dimensions Maximum Gross Mass
Length Height Width Length Height Width
1EEE ** 45 foot high cube 13.716 m / 45' 0" 2.896 m / 9' 6" 2.438 m / 8' 0" 13.542 m (44' 5.15") 2.655 m (8' 8.5") 2.330 m (7' 7.73") 30480kg / 67200 lbs
1EE ** 45 foot standard 2.591 m / 8' 6" 2.350 m (7' 8.5")
1AAA 40 foot high cube 12.192 m / 40' 0" 2.896 m / 9' 6" 2.438 m / 8' 0" 11.998 m (39' 4.375") 2.655 m (8' 8.5") 2.330 m (7' 7.73") 30480kg / 67200 lbs
1AA 40 foot standard 2.591 m / 8' 6" 2.350 m (7' 8.5")
1A 40 foot 2.438 m / 8' 0" 2.197 m (7' 2.5")
1BBB 30 foot high cube 9.125 m / 29' 11.25" 2.896 m / 9' 6" 8.931 m (29' 3.6") 2.655 m (8' 8.5") 30480kg / 67200 lbs ***
1BB 30 foot standard 2.591 m / 8' 6" 2.350 m (7' 8.5")
1B 30 foot 2.438 m / 8' 0" 2.197 m (7' 2.5")
1CC 20 foot standard 6.058 m / 19' 10.5" 2.591 m / 8' 6" 5.867 m (19' 3") 2.350 m (7' 8.5")
1C 20 foot 2.438 m / 8' 0" 2.197 m (7' 2.5")
1D 10 foot 2.991 m / 9' 9.75" 2.438 m / 8' 0" 2.802 m (9' 2.3") 2.197 m (7' 2.5") 10160 kg / 22400 lbs
1E **** 6½ foot 1.968 m / 6' 5.5" 2.438 m / 8' 0" 2.438 m / 8' 0" 2.197 m (7' 2.5") 2.330 m (7' 7.73") 7110 kg / 15700 lbs
1F **** 5 foot 1.460 m / 4' 9.5" 2.438 m / 8' 0" 2.197 m (7' 2.5") 5080 kg / 11200 lbs
* The standard also recognises containers less than 8 feet in height, under the designations 1AX, 1BX, 1CX and 1DX, with specifications the same as other containers of their length.
** Forty-five foot containers were added to the standard per Amendment 2 of 2005.[2]
*** The maximum gross mass rating of twenty and thirty foot units was uprated with Amendment 1 of 2005.[1] Until then, the MGW for 20-ft units was 24,000 kg / 52,900 lbs, and for 30-ft units 25,400 kg / 56,000 lbs.
**** Six and a half and five foot containers (type 1E and 1F) are not in the current edition ISO 668 standard, but were standardised in previous editions,[3] and are still manufactured.[4]
The so-called width of these small-size containers may be perceived as their length, as it is their greatest horizontal dimension, and their doors are typically in the short end(s).

See also[edit]

  • ISO 1496-1 — Series 1 Freight Containers — Specification and Testing — Part 1, General Cargo Containers
  • ISO 6346 — standard covering the coding, identification and marking of intermodal containers

References[edit]

External links[edit]