Sun zo cikin nau'ikan girma dabam, amma mafi yawan suna da tsayin ƙafa 20 da 40.
The modern container shipping industry owes much of its success to the standardisation of containers.
Shipping containers come in several sizes, but the two most common sizes are 20 feet and 40 feet in length. There are several reasons for this standardisation:
inganci: standardising container sizes greatly improves the efficiency of loading and unloading cargo. Ports, trucks, trains, and container ships are designed to handle containers of specific sizes. This consistency streamlines the transportation process, reduces the need for custom handling equipment, and speeds up cargo transfer.
Daidaituwar Intermodal: standard container sizes are compatible with various modes of transportation, including trucks, trains, and ships. This intermodal compatibility ensures that containers can seamlessly transition between different forms of transportation without needing to transfer their contents.
Tari da Ajiyewa: Yawancin kwantena ana tarawa ana adana su a cikin yadi na kwantena ko a cikin jiragen ruwa. Madaidaitan masu girma dabam suna ba da sauƙin tarawa da kiyaye kwantena yadda ya kamata. Daban-daban masu girma dabam ko kwantena waɗanda ba daidai ba zasu rikitar da tsarin tarawa kuma suna haifar da rashin aiki a cikin ajiya da sufuri.
Karɓar masana'antu: Amincewa da kwantena mai ƙafa 20 da ƙafa 40 a matsayin matsayin masana'antu ya haifar da tattalin arziƙin ma'auni. Masu masana'anta suna samar da waɗannan nau'ikan kwantena da yawa, yana sa su zama mafi inganci don samarwa da siye.
Canjin Kaya: Yayin da kwantena masu ƙafa 20 da ƙafa 40 sune mafi yawan girma, har yanzu suna ba da sassauci dangane da ƙarfin kaya. Kasuwanci za su iya zaɓar girman kwantena wanda ya fi dacewa da buƙatun kayan su, yana tabbatar da cewa an yi amfani da sarari yadda ya kamata yayin rage sarari mara komai da farashin sufuri.
Yarjejeniyar Duniya: Ƙungiyar Ƙasa ta Duniya (ISO) ta kafa daidaitattun girman kwantena a cikin ISO 668. Wannan yarjejeniya ta kasa da kasa tana taimakawa wajen tabbatar da daidaito da daidaituwa a kasuwancin duniya.
Yayin da kwantena ƙafa 20 da ƙafa 40 sune mafi yawan girma, akwai bambance-bambance da kwantena na musamman da aka tsara don takamaiman nau'ikan kaya. Misali, akwai manyan kwantena masu tsayi da tsayi fiye da kwantena na yau da kullun, kwantena masu sanyi don kaya masu zafin zafi, da kwantena masu buɗe ido don manyan kaya. Waɗannan bambance-bambancen suna ba da wasu sassauƙa don ɗaukar buƙatun kaya daban-daban yayin kiyaye fa'idodin daidaitawa.