The TWORTY solution

In order to significantly reduce the shipments of "containerised air" the TWORTY BOX has been developed. Its outside appearance resembles any standard 20ft container. However the TWORTY BOX is unique in that it has doors at each end, the second set of doors opening to the inside and can only be locked from the inside. This door can be fixed to the container ceiling and with the use of special bonding elements another TWORTY BOX can be joined up, thereby creating a 40ft unit of full value.

Thus TWORTIES can either be used as a 20ft or coupled as a 40ft box:

Twenty + Forty = "Tworty"

Therefore all empty positionings caused by the need to balance different supply and demand of both container sizes can be avoided. Even if empty TWORTIES have to be positioned (e.g. due to inevitable imbalances of the general cargo flow) they can be coupled and immediately 50% of all lift on/lift off charges are saved.

If two TWORTIES are coupled to a 40ft box the additional doors will be opened and fixed to the container ceiling to receive the full 40ft inside space. Operated as a 20ft box this door is locked, access is only through the existing standard door. Two coupled TWORTIES make a 40ft box with doors at both ends. The system does not require any additional components and the coupled boxes remain watertight. The TWORTY BOX fulfills all ISO requirements for containers.

The coupling is carried out by bonding elements which guarantees that two TWORTIES can be handled like one 40ft container. The connection of two TWORTIES can only be released from the inside.

The TWORTY concept is protected by international patents.