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CTU Code

Absolute humidity of air Actual amount of water vapour in the air, measured in g/m3 or g/kg.
Boundary Refers to the edges or walls of the CTU, and surrounds the cargo deck.
Cargo deck The area within the CTU boundaries onto which packages may be placed and secured.
Cargo transport unit (CTU) A freight container, swap body, vehicle, railway wagon or any other similar unit in particular when used in intermodal transport
Carrier The party who, in a contract of carriage, undertakes to perform or to procure the performance of carriage by rail, road, sea, inland waterway or by a combination of such modes. Can be further classified as:

•     Road haulier;

•     Rail operator;

•     Shipping line

Clean CTU A CTU free from:

•     Any previous cargo residues;

•     Any securing materials used from previous consignments;

•     Any marks, placards or signs associated with   previous consignments;

•     Any detritus (waste) that may have accumulated in the CTU;

•     Visible pests and other living or dead organisms, including any part, gametes, seeds, eggs or  propagules of such species that may survive and subsequently reproduce; soil; organic matter;

•     All other items covered by contamination, infestation and invasive alien species that can be discovered upon visible inspection.

Closed CTU A CTU which totally encloses the contents by permanent structures with complete and rigid surfaces. CTUs with fabric sides or tops are not considered as closed cargo transport units.
Condensation Conversion of water vapour into a liquid state. Condensation usually starts when air is cooled down to its dew point in contact with cold surfaces.
Consignee The party to whom a cargo is consigned under a contract of carriage or a transport document or electronic transport record. Also known as the receiver.
Consignor The party who prepares a consignment for transport. If the consignor contracts the transport operation with the carrier, the consignor will undertake the function of the shipper and may also be known as:

•     The shipper (maritime);

•     The sender (road transport).

Consolidator The party performing a consolidation service for others.
Contamination Visible forms of animals, insects or other invertebrates (alive or dead, in any lifecycle stage, including egg casings or rafts), or any organic material of animal origin (including blood, bones, hair, flesh, secretions, excretions); viable or non-viable plants or plant products (including fruit, seeds, leaves, twigs, roots, bark); or other organic material, including fungi; or soil, or water; where such products are not the manifested cargo within the CTU.
Corrosion threshold A relative humidity of 40% or more will lead to an increasing risk of corrosion of ferrous metals
Crypto climate in the CTU State of relative humidity of the air in a closed CTU, which depends on the water content of the cargo or materials in the CTU and on the ambient temperature.
CTU Code IMO/ILO/UNECE Code of Practice for Packing of Cargo Transport Units (CTUs).
CTU operator The party who owns or operates the CTU and provides empty CTUs to the consignor/shipper/packer.
Daily temperature variation

in the CTU


Rise and fall of temperature in accordance with the times of day and often exaggerated by radiation or other weather influences.
Dew point of air Temperature below the actual temperature at which a given relative humidity would reach 100%.
Flexitank Bladder used for the transport and/or storage of a non-regulated liquid inside a CTU.
Form locking A method for cargo securing and means that the cargo is completely stowed against the boundaries of a CTU. The empty space between the cargo units and between the cargo and the boundaries should be minimized. The boundaries should be strong enough to absorb the normal forces that occur during transport.
Freight container

An article of transport equipment that is of a permanent character and accordingly strong enough to be suitable for repeated use; specially designed to facilitate the transport of goods, by one or other modes of transport, without intermediate reloading: designed to be secured and/or readily handled, having fittings for these purposes, and approved in accordance with the International Convention for Safe Containers (CSC), 1972, as amended. The term “freight container” includes neither vehicle nor packaging; however a freight container that is carried on a chassis is included.

Read More: CTU CODE

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