National Transport Commission (Road Transport Legislation – Vehicle Standards) Regulations 2006
165Selection of kingpins for B‑doubles and road trains
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165 Selection of kingpins for B‑doubles and road trains
(1) A kingpin used in a B‑double or road train must: (a) be a 50, 75 or 90 millimetre kingpin; and (b) have a D‑value complying with Australian Standard AS 2175–1990, Articulated Vehicles—Kingpins. (2) A 50 or 90 millimetre kingpin used in a B‑double or road train must: (a) be built to meet the dimension requirements in Australian Standard AS 2175–1990, Articulated Vehicles—Kingpins; and (b) not be worn away more than recommended by the standard. (3) A 75 millimetre kingpin used in a B‑double or road train must: (a) be built to meet the dimensions in the following essential diagram; and (b) not be worn away more than mentioned in subrule (4).
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Dimensions of a 75 millimetre kingpin
(4) In testing a 75 millimetre kingpin mentioned in the essential diagram in subrule (3) to decide whether its D‑value complies with subrule (1)(b): (a) diameter F must not wear more than 3 millimetres; and (b) diameter G must not wear more than 2 millimetres; and (c) height H must not wear more than 2.3 millimetres.