All cargo has individual or specific transportation requirements. The several types of containers used are specially geared to these requirements.
It is your responsibility to ensure, that transportation requirements of your cargo are fulfilled, i.e. to make sure the goods are packed and stowed in the right container, economically, safely and with quality controls. Hecksher can be of assistance with useful information.
The dimensions of the single containers may be slightly different, depending on the shipping line used. The maximum payload furthermore depends also on road regulations at the Country of Origin and Destination.