GlossaryEN1 min readUpdated: Jun 26, 2026
Unit Load Devices (ULD)
When air freight enters the loading process, individual shipments are first consolidated into Unit Load Devices (ULDs) – standardized containers and pallets contoured to match the cargo compartment geometry of specific aircraft types.
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Source: https://www.iata.org/en/programs/cargo/uld/
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Definition & Explanation
When air freight enters the loading process, individual shipments are first consolidated into Unit Load Devices (ULDs) – standardized containers and pallets contoured to match the cargo compartment geometry of specific aircraft types. They slide into the hold via roller decks or loader vehicles, cutting ramp time significantly compared with loose loading. A single ULD can hold hundreds of individual shipments, all weighed, documented, and handled as one unit. Common types include the LD3 and LD7 for wide-body lower decks, with full-pallet configurations used on main decks of freighter aircraft. IATA sets the technical standards for ULD dimensions, weight limits, and airworthiness; liability for damaged or missing units is settled between airlines and ground stations under those rules.
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