BS AU 3:1970

This standard BS AU 3:1970 Specification for clearance dimensions and fifth wheel positions for tractors and semi-trailers is classified in these ICS categories:

• 43.040.70 Couplings

1.1 This British Standard specifies clearance dimensions and the positions and heights of fifth wheel attachments fitted to the tractive units of articulated vehicles for the purpose of coupling semi-trailers. It relates to towing vehicles with single rear axles not exceeding 2.5 metres width and to semi-trailers fitted with king pins complying with BS AU 1¹⁾.

1.2 The standard applies to vehicles in normal road use and excludes vehicles used under cross-country conditions.