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

Service summary

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.

Please consult the Contact Officer for more information and to ascertain the level of compliance (if any) that may be required.

Service type

Code of Practice

A code of practice can be either a legal requirement or non-legal requirement. Legal codes of practice are defined as a result of legislation. Non-legal codes of practice are defined by industry regulators and bodies.

Other resources


Australian Standards AS/NZS 4968:2003 (parts 1-3): Heavy-Road Vehicles - Mechanical Coupling Between Articulated Vehicle Combinations - Design Criteria and Selection Requirements for Fifth Wheel, Kingpin and Associated Equipment - Please consult the Contact Officer for information on this standard.

Administering agency

Department of Infrastructure and Regional Development
Surface Transport Policy

Act(s) name

Interstate Road Transport Act 1985 (Australian Government)

Regulation(s) name

Interstate Road Transport Regulations 1986 (Australian Government)

Contact details

General Enquiries
Department of Infrastructure and Regional Development
Surface Transport Policy

Operating address:
111 Alinga Street
Australian Capital Territory 2600




02 62747111


The information contained on the Australian Business Licence and Information Service (ABLIS) web site, or via packages or other sources is intended for general guidance only.

To the full extent permitted by law, the Federal, State, Territory and Local Governments make no representations or warranties (expressed or implied) in relation to the information, including its accuracy, currency or completeness.

The business information provided does not constitute professional or legal advice, nor is the use of any third party resource an endorsement of the information contained, the associated organisation, product or service. It is recommended that you obtain appropriate professional and /or independent legal advice to ensure that the material provided here is relevant to your particular circumstances.

To the full extent permitted by law the Federal, State, Territory and Local Governments, their employees and agents do not accept any liability for any reason, including without limitation, liability in negligence, to any person for the general information which is provided herein, or in respect of anything, including the consequences of anything done, or not done, by any such person in whole or partial reliance upon the information.