Tech Talk

Updated mechanical coupling standards released

Standards Australia has released updated versions of mechanical couplings standards for 2023.

Heavy Vehicle Industry Australia (HVIA) explained what these changes mean.

The Australian/New Zealand Standard 4968 (Heavy road vehicles – Mechanical coupling between articulated vehicle combinations) comprises the following three individual parts, each of which has been received minor updates and improvements for 2023.

  • 4968.1:2023 – Part 1: Design criteria and selection requirements for fifth-wheel, kingpin, and associated equipment
  • 4968.2:2023 – Part 2: Testing and installation of fifth-wheel and associated equipment
  • 4968.3:2023 – Part 3: Kingpins and associated equipment

The updates include various improvements to aid clarity and reduce ambiguity, particularly in relation to the D-value formula and calculation of design forces. All changes are listed in the ‘preface’ section of the individual documents.

The Standard can be viewed here.

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