Australian Standard AS 1771-1987 Installation of Fifth Wheel and Turn-Table - Australian Government


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 prime mover or semi-trailer.

Fifth wheel assemblies must be mounted on prime movers and semi-trailers according to the requirements of 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 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

Interstate Road Transport Act 1985 AG

Regulation(s) name

Interstate Road Transport Regulations 1986 AG

Administering agency

Department of Infrastructure, Regional Development and Cities

Surface Transport Policy

Contact details

Contact Email, Phone and Address Details for this service in simple two column table format, header then data.

General Enquiries

Surface Transport Policy

Department of Infrastructure, Regional Development and Cities

Operating address: 111 Alinga Street
Australian Capital Territory 2600
Phone: 1800 075 001
Phone: 02 6274 7111