Weighbridge locations
A weighbridge docket may be required as part of a registration inspection process, this provides the Approved Inspection Station (AIS) evidence of the Tare/Unladen Mass which is required for registration purposes. The National Heavy Vehicle Regulator (NHVR) requires the Tare/Unladen Mass of a heavy vehicle to be recorded on the registration record (any vehicle with a GVM in excess of 4.5t).
Aggregate Trailer Mass (ATM) = Total mass of the trailer when carrying the maximum load recommended by the manufacturer. This includes mass imposed onto the towing vehicle when the combination vehicle is resting on a horizontal supporting plane.
Gross Trailer Mass (GTM) = the mass transmitted to the ground by the tyres of the trailer when coupled to a towing vehicle and carrying the maximum load recommended by the manufacturer or importer, approximately uniformly distributed over the load bearing area.
Tare Mass (Unladed Mass) = total mass of the trailer when not carrying any load, but when ready for service, unoccupied (if relevant) and with all fluid reservoirs (if fitted) filled to nominal capacity except for fuel, which shall be 10 litres only, and with all standard equipment and any options fitted. This includes any mass imposed onto the drawing vehicle when the combination vehicle is resting on a horizontal supporting plane. (Fluid reservoirs do not include water tanks and waste water tanks fitted to caravans).