Document ID: chunk:federal_register_of_legislation:F2021C00470:body:0:p2
Version: federal_register_of_legislation:F2021C00470
Segment Type: other
Provision Reference: 
Character Range: 4713–8364

Not Applicable
Very light trailer                 TA                                             O1                     Not Applicable
Light trailer                      TB                                             O2                     Not Applicable
Medium trailer                     TC                                             O3                     Not Applicable
Heavy trailer                      TD                                             O4                     Not Applicable

23.1.                                DEFINITIONS
23.1.1.                          Refer to Vehicle Standard (Australian Design Rule Definitions and Vehicle Categories) 2005.
23.1.2.                          'Asymmetrical Tyre' - a tyre which, through 'Tread' pattern or construction, is requited to be fitted to a vehicle such that one particular 'Sidewall' faces outwards.
23.1.3.                          'Bead' - that part of the tyre usually made of steel wires, wrapped or reinforced by 'Ply' 'Cords', that is shaped to fit the 'Rims'
23.1.4.                          'Bead Separation' - a breakdown of bond between components in the `Bead area.
23.1.5.                          'Belt' - a layer or layers of 'Cord' or other reinforcement under the 'Tread' to stiffen the tyre structure.
23.1.6.                          'Belt Separation' - a parting of rubber compound between 'Belt' layers or between 'Belts' and `Plies'.
23.1.7.                          'Chunking' - the breaking away of pieces of the `Tread'
23.1.8.                          `Cord Separation' – 'Cord' parting away from adjacent rubber compounds.
23.1.9.                          'Measuring Rim' - any 'Rim' with a width as specified for the design or measuring rim for a particular tyre size designation, and with the `Bead' seat and flange dimensions for that `Rim', as shown in one or more of the following documents or in case of obsolete sizes no longer listed, in any edition of the following documents prior to the dates listed
23.1.9.1.                    the Tyre and Rim Standards  Manual of the Tyre and Rim Association of Australia, 1985 Edition:
23.1.9.2.                    the 1985 Tyre and Rim Association Inc. Year Book
23.1.9.3.                    the Japan Automobile Tyre Manufacturers Association Year Book 1986 Edition
23.1.9.4.                    the Japanese Industrial Standards (JIS - D4202) dated 1977 Dimension of Tyres, and (JIS - D4218) dated 1981 Contours of Rims.
23.1.9.5.                    the European Tyre and Rim Technical Organisation (ETRTO) Data Book dated 1986.
23.1.10.                      'Overall Tyre Width' - the linear distance between the exteriors of the 'Sidewalls' of an inflated tyre, including elevations due to labelling, decorations, or protective bands or rib.
23.1.11.                      'Ply Separator' - a parting of rubber compound between adjacent 'Plies'.
23.1.12.                      'Section Width' - the linear distance between the exteriors of the 'Sidewalls' of an inflated tyre, excluding elevations due to labelling, decoration, or protective bands.
23.1.13.                      'Service Description' - the combination of 'Load Index' and 'Speed Category' symbol.
23.1.14.                      'Sidewall' - that portion of a tyre between the 'Tread' and the 'Bead'.
23.1.15.                      'Size Factor' - the sum of the 'Section Width' and the outer diameter of a tyre determined on the 'Measuring Rim'.
23.1.16.                      'Specified Design Section Width' - the width specified in the 'Nominated Standard' for a new tyre of that size designation and type when inflated on its 'Measuring