Airfreight uses cargo transport units known as Unit Load Devices (ULD). Many types and shapes of ULD fit the unique requirements of aircraft holds, including refrigerated ULD. All conform to standards established by the International Airline Transport Association (IATA).
ULD come in two common types: containers and pallets. Many cargo aircraft configurations allow a combination of these types with various sizes.
The maximum accepted weight (payload) varies by aircraft type and the particular container or pallet build-up. The same goes for pallets volumes. These also vary according to lower deck or main deck loading.
The actual dimensions may differ according to the manufacturer or aircraft type. Below you find the most usual ULD and their specifications.
Your forwarder or carrier is best equipped to assist you in choosing the most suitable ULD for your needs.