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Platforma 3E-RS: an EU class O4 trailer with a gross vehicle weight of 42,000 kg, an unladen weight of 5,890 kg and a payload of 36,110 kg, built in 2001

Platforma 3E-RS
Pictured: Platforma 3E-RS

The Platforma 3E-RS falls into EU trailer class O4 with a gross vehicle weight of 42,000 kg. Trailers of this size are built for professional freight transport, usually paired with a specifically approved towing vehicle, and carry a substantial share of their payload independent of their own body weight.

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The 2001 3E-RS has an unladen weight of just 5,890 kg and, at a gross vehicle weight of 42,000 kg, reaches a payload of 36,110 kg, a very high share for class O4. At 13,830 mm long and 2,550 mm wide, it is a long, light platform build made for bulky but comparatively light goods. Such a wide margin between unladen weight and payload is typical of flatbed platforms built for volume rather than density.

Above 10 tonnes of gross vehicle weight, a simple overrun brake is no longer permitted; class O4 trailers need an air brake system that works together with the towing vehicle's brakes. The towing vehicle and trailer must be matched to the combined train weight, and such a combination is driven with a category CE licence.

On a trailer of this age, check the frame and axle mountings for through-corrosion first, and the welds for cracks. The brake system and brake lines need a tightness check, and the tyres should be judged on ageing rather than tread depth alone. Incomplete lighting or a damaged underrun guard regularly lead to rejection at the roadworthiness test.

Sources: SpecCodex-Register: Kennwerte des Modells 3E-RS

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