The following 3 points are the basis for correct loading:
Normally, it is during braking that the greatest stresses on the load and fastenings arise. This means that the fastening must at least withstand:
If you have loaded a refrigerator weighing 40 kg onto a trailer, the straps must withstand a minimum pressure of 32 kg (80% of 40) in a forward direction and 20 kg (50% of 40) in the other directions.
With a category B licence, you are only allowed to tow a light trailer. The matter of which trailers are classed as light is often determined by the weight of the towing car.
Note that there is a difference between what is classed as a light trailer and whether or not the car is permitted to tow the trailer!
Trailer, example 1 | |
The trailer’s total weight is less than 750 kg and is therefore classed as light. No calculations need to be done. |
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Total weight: 600 kg |
Trailer, example 2 | |
Total weight: 2,100 kg | Total weight: 1,400 kg |
Calculations must be done, as the trailer’s total weight exceeds 750 kg. The combined total weight (2,100 kg + 1,400 kg = 3,500 kg) is 3.5 tonnes exactly, but does not exceed 3.5 tonnes. This means that the trailer is classed as light. |
Trailer, example 3 | |
Total weight: 1,800 kg | Total weight: 2,000 kg |
Calculations must be done, as the trailer’s total weight exceeds 750 kg. The combined total weight (1,800 kg + 2,000 kg = 3,800 kg) exceeds 3.5 tonnes, which means that the trailer is not classed as light. |
In practice, the above calculations are seldom necessary. All of information you need is found in the car registration certificate:
The car with this registration certificate is permitted to tow a trailer weighing a maximum 1,500 kg, though not with a regular category B driving licence, as O.3 stipulates that the maximum trailer weight for a category B driving licence is 1,440 kg.
Am I permitted to use this car to tow a trailer weighing 1,600 kg with the extended B category or BE licence?
– No, as the maximum weight specified in O.1 may never be exceeded, regardless of category. The car is not built to handle heavier trailers.
Ball pressure is the pressure which the trailer’s coupling device exerts on the car’s towbar. Normally, the ball pressure should lie somewhere in the interval 30–100 kg.
Excessive load at the front of the trailer. This gives poor traction with the front wheels and makes the dipped headlights dazzle.
The load is all the way forward in the trailer (the red box) and is therefore pressing the coupling device towards the ground. The car is forced to follow it, and since the car is straight, the front end is elevated.
Excessive load at the back of the trailer. This gives poor traction in the rear wheels. Can lead to a driving ban.
The load is placed far back in the trailer (the red box) and is therefore tipping the trailer backwards so that the coupling device is pushed upwards. The rear of the car is lifted by the coupling device.
The lorry has a trailer, which means that the overtaking distance will be longer.
Last updated 2022-02-25.