Gross Vehicle Mass (GVM), Gross Combination Mass (GCM) and weight limits
The limits on the mass or weight of your heavy vehicle, including the load, are set to increase safety and reduce wear on roads and bridges.
Vehicle manufacturers set gross mass (GVM/GCM) limits for each vehicle model.
A vehicle must not be operated at a mass limit that will exceed the:
- manufacturer’s GVM/GCM
- manufacturer’s individual component rating (i.e. axles, springs, tyres etc)
- statutory mass limits or overall axle spacings.
It is the operator’s responsibility to make sure these limits are not exceeded.
Gross vehicle mass (GVM)
The GVM is the maximum loaded weight of a rigid vehicle while driving on the road.
Gross combination mass (GCM)
The GCM is the maximum loaded weight of the towing vehicle and any trailer, or trailers, being towed while driving on the road.
Gross road train mass (GRT M)
The GRT M is the maximum loaded weight of a road train while driving on the road.
Gross trailer mass (GTM)
The GTM is the maximum mass on the axle(s) of a trailer when fully loaded while driving on the road.