New South Wales Consolidated Regulations

HEAVY VEHICLE (MASS, DIMENSION AND LOADING) NATIONAL REGULATION (NSW) - REG 9

9 How to work out the relevant mass for a towing vehicle without a GCM

(1) For the purposes of section 8(3), if the towing vehicle of a combination does not have a GCM and is fitted with a single-drive axle, single-drive tandem axle group or dual-drive tandem axle group, the mass, in kilograms, is worked out by using the following formula--

(2) In the formula under subsection (1)--

(a)
"M" means mass in kilograms; and

(b)
"K" means the following--

(i) if the towing vehicle is fitted with a single-drive axle--0.055;

(ii) if the towing vehicle is fitted with a single-drive tandem axle group--0.053;

(iii) if the towing vehicle is fitted with a dual-drive tandem axle group--0.051; and

(c)
"TR" means the number of tyre revolutions per kilometre, stated by the manufacturer, of the tyres fitted to the towing vehicle's driving axles; and

(d)
"R" means the overall gear reduction between the towing vehicle's engine and the wheels on the vehicle's driving axles; and

(e)
"T" means the towing vehicle's maximum engine net torque in newton-metres.

Example--: A towing vehicle does not have a GCM if--

(a) the total maximum mass for the vehicle and any vehicles it may lawfully tow at any given time is not stated by the vehicle's manufacturer on the vehicle's identification plate or another place on the vehicle; and

(b) a registration authority has not, under an Australian road law, specified the total maximum loaded mass for the vehicle and any vehicles it may lawfully tow at any given time because the vehicle has not been the subject of an application for registration under an Australian road law or an application for an unregistered heavy vehicle permit under the Law.