The maximum legal axle weight on a highway are: SINGLE AXLE 9 100 kg, any ONE AXLE of a TRIDEM or TANDEM AXLE GROUP 9 100 kg, the axle weight difference between adjacent axles 1 000 kg maximum, the gross weight on the steering axle of an all-wheel-drive three axle truck is 7 500 kg maximum, the gross weight of any two adjacent axles in a TRIDEM AXLE GROUP 17 000 kg maximum (except in case of a tridem pole trailer), the sum of the axle loads on the drive axles and jeep axle in a tandem drive truck tractor in combination with a single axle jeep and lowbed semi-trailer 24 000 kg. The maximum licensed gross vehicle weight of a vehicle or combination of vehicles must not exceed 63 500 kg.
A person may, without a permit, operate the semi-trailer of a 2-vehicle combination with a spread tandem axle, if the interaxle spacing between the 2 non-steering axles exceeds 185 cm but does not exceed 307 cm, provided that the sum of the axle weight for both axles does not exceed 9 100 kg.
A person must not, without an overload permit, drive or operate on a highway when
GROSS VEHICLE WEIGHT