Division 5 Vehicles of category O
United Kingdom
| Ref. | Code | Name | Definition |
|---|---|---|---|
| 5.1. | DA | Semi-trailer | A trailer that is designed and constructed to be coupled to a tractor unit or to a converter dolly and to impose a substantial vertical load on the towing vehicle or on the converter dolly. The coupling to be used for a vehicle combination shall consist of a king pin and a fifth wheel. |
| 5.2. | DB | Drawbar trailer | A trailer having at least two axles, of which at least one is a steered axle:
|
| 5.3. | DC | Centre-axle trailer | A trailer where the axle(s) is (are) positioned close to the centre of gravity of the vehicle (when uniformly loaded) so that only a small static vertical load, not exceeding 10 % of that corresponding to the maximum mass of the trailer or a load of 1 000 daN (whichever is the lesser) is transmitted to the towing vehicle. |
| 5.4. | DE | Rigid drawbar trailer | A trailer with one axle or one group of axles fitted with a drawbar which transmits a static load not exceeding 4 000 daN to the towing vehicle due to its construction and that does not meet the definition of a centre-axle trailer. The coupling to be used for a vehicle combination shall not consist of a king pin and a fifth wheel. |