Dangerous goods can travel in groupage where the ADR agreement permits them to be loaded together with the rest of the freight and where marking, documentation and vehicle equipment requirements are met. We assess every consolidation individually against the UN number, class, packing group and quantity, not against a general assurance from the shipper.
Where the assessment starts
The starting point is not the trade name of the product but the data on the safety data sheet: UN number, proper shipping name, class and any subsidiary risk, packing group, and quantity per package and in total. Only with that set can anyone judge whether a consignment is suitable for consolidation and what has to be in place. The basics are covered in transporting dangerous goods, and the classification in ADR classes 1 to 9.
Limited and excepted quantities: the usual route into groupage
Many everyday products such as cosmetics, paints and household chemicals travel in small inner packagings and benefit from the relief available for limited quantities. Where the conditions on inner packaging size and package marking are met, the movement falls under considerably lighter requirements. This is the most common route by which chemical goods enter groupage. The conditions are set out in exemptions and limited quantities.
The quantity threshold and what changes above it
ADR provides relief linked to the quantity carried per transport unit. Below the threshold requirements are limited; above it the vehicle must carry orange plates, the driver must hold the appropriate certificate, and the movement is subject to the full equipment and supervision requirements. In consolidation the quantities are added together under the rules in the agreement, so adding one more consignment can push an entire load into a higher tier. That is the real reason not every consignment can simply be added to a departing vehicle.
Transport document and package marking
Every dangerous item has to be described in the transport document in the sequence and form the agreement prescribes: UN number, proper shipping name, labels, packing group, number and type of packages, and mass or volume. Packages need legible hazard labels and marks. This is not paperwork for its own sake: in an incident the emergency services work from exactly that data. Gaps in the description are also the most common reason a vehicle is detained at a roadside check.
The Channel crossing adds its own limits
A consolidation can be correct under ADR and still fail to reach the islands, because crossing operators apply their own restrictions by class, and the tunnel works to different rules than a ferry. That drives the choice of route and sometimes the date. We cover it in ADR by ferry and Eurotunnel, and the British context in ADR to the UK after Brexit. Lithium batteries are a case of their own, covered in shipping lithium batteries.
How we handle it
We ask for the safety data sheet before accepting a job, check compatibility against the rest of the freight planned for that departure, and only then confirm a date. Where consolidation is not possible we offer another departure or a dedicated ADR movement. We do not publish ready-made compatibility tables, because the answer depends on the specific combination of consignments rather than on a general rule. Single pallets travel on our groupage departures to the islands.
Vehicle equipment and driver obligations
Consolidating dangerous goods is not only a question of what may be loaded together. It also changes what the vehicle looks like and what it must carry. Depending on the quantity and class involved, the requirements can include orange plate marking, fire-fighting equipment to a defined specification, personal protective equipment for the driver and means of securing the scene of an incident. The driver must hold a valid training certificate covering the classes carried and know where stopping is permitted and where it is not. Add to that the duty to carry the transport document and written instructions in the cab. This feeds straight into planning: if the vehicle takes one consignment subject to the full requirements, all of those conditions apply for the whole journey, including the time when every other pallet on the trailer is entirely ordinary.
Sources
This is general information, not an assessment of a specific load. Have goods with a UN number and want to know whether they fit into groupage? Send the safety data sheet and consignment details through our quote form and we will tell you whether and how we can take them.
