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Hoerndl Sfg37-23-Nl – EU category O4 trailer, built in 1988: 37,000 kg gross weight, 25,780 kg payload, 11.40 m length, 7.80 m wheelbase.
With a gross weight of 37,000 kg, the Hoerndl Sfg37-23-Nl falls into EU trailer class O4, the heavy trailers and semi-trailers above 10 tonnes towed behind heavy tractor units in long-haul transport.
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With an unladen weight of 11,220 kg, payload comes to 25,780 kg, around 70 per cent of the gross weight. At 11.40 m long, 2.50 m wide and with a 7.80 m wheelbase, the trailer sits on a long, multi-axle chassis built for bulky or heavy general cargo across the full length of the deck, the kind of load that needs both floor space and axle capacity.
From class O3 upwards, trailers of this size are generally fitted with air brakes rather than the simple overrun brake used on light trailers. Towing it as a combination requires driving licence category C1E or CE in the EU, depending on the combined train weight. The comparatively high unladen weight points to a sturdy chassis built for continuous heavy-duty use rather than for the lowest possible tare weight.
When buying a used trailer of this kind, check the condition of the air brake system including lines and brake cylinders, rust on the frame and side members, the lighting along the full length of the vehicle, and the tyres and wheel bearings. On a vehicle of this age, it is also worth closely checking the frame for cracks, earlier repair welds, and the condition of the towing coupling after decades of service.
Sources: SpecCodex-Register: Kennwerte des Modells Hoerndl Sfg37-23-Nl, Zulassungsdaten RDW (Niederlande)
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