Atc SP ZOO

The register lists 8 versions with kerb weights from 6,700 to 12,100 kg, gross weights from 44,000 to 50,000 kg, lengths from 12,945 to 16,915 mm and widths from 2,500 to 2,550 mm. The figures consistently match multi-axle semi-trailers at the top of the heavy-haulage segment.

With gross weights from 44,000 to 50,000 kg, the range sits well above the usual 40-tonne limit for normal road haulage and falls into EU trailer category O4 with mandatory air brakes. Journeys with a gross weight above 40 tonnes require an exceptional or individual heavy-haulage permit in most European countries, often combined with a route check, escort vehicle or speed restriction. The tow vehicle required is a tractor unit with licence category CE, and at this weight class the load distribution across the semi-trailer's several, often steerable axles becomes critical as well.

Semi-trailers of this size carry bulk goods, building materials or mass cargo over 40 tonnes gross weight and are mainly used by hauliers in heavy haulage. The tight clustering between 44 and 50 tonnes shows a specialisation at the upper end of the permitted semi-trailer class.

When buying used in this weight class, check the condition of the chassis and axle units, the brakes, tyres and suspension, and the registration documents, since weights above 44 tonnes usually require special permits. Parts for axles, brakes and suspension are available through the general commercial-vehicle trade.