Australian Standard AS 2175-1990 Articulated Vehicles - Kingpins - Australian Government


Note that this standard has been updated and you will need to meet the requirements set out in  AS/NZS 4968.1:2023:Heavy road vehicles - Mechanical coupling between articulated vehicle combinations Design criteria and selection requirements for fifth wheel, kingpin and associated equipment.

You may be required to comply with this Standard if you operate a long distance interstate road transport business and you intend to use a B-double. A B-double is a vehicle consisting of a prime-mover, and two trailers.

The fifth wheel kingpins of the B-double must meet the relevant rating and dimensional requirements set out in this Standard.

This standard sets out the attachment design forces for fifth wheel assembly and equations to determine the required D-value of components for various combinations. This standard applies to fifth wheel assemblies used with 50 mm, 75 mm and 90 mm kingpins, and associated equipment for articulated vehicle combination, used in heavy road vehicles, B-doubles and road trains, in normal use on both sealed and unsealed roads.


Service type

Code of Practice

A code of practice is a set of rules which details how people in a certain industry should behave. A code of practice can be defined as a result of legislation or by industry regulators and bodies.

Act(s) name

Road Vehicle Standards Act 2018 Australian Government

Regulation(s) name

Vehicle Standard (Australian Design Rule 62/00 - Mechanical Connections Between Vehicles) 2006 Australian Government

Administering agency

Department of Infrastructure, Transport, Regional Development, Communications and the Arts

Contact details

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