A weighbridge visit is valuable only when the measurements answer clear questions. The aim is not to collect one “combined weight.” It is to build a repeatable evidence set that shows the loaded tow vehicle, caravan wheels, coupling effect and axle loads.
Before weighbridge day
- Choose the load state you want to test: real travel load is usually the most useful.
- Load the usual passengers, fuel, food, water, gas, tools, bikes and accessories.
- Record fuel and tank levels, passenger count and any gear deliberately left out.
- Collect the ratings for GVM, GCM, ATM, GTM, front and rear axles, caravan axle group, tyres, towbar and coupling.
- Confirm the weighbridge can provide the separate platform positions or passes you require and whether an appointment is needed.
A practical multi-pass sequence
The exact procedure depends on the weighbridge layout and operator. A commonly useful sequence includes:
- Loaded tow vehicle only: measure total vehicle mass and, where the platform permits, front and rear axle loads.
- Loaded combination: measure the tow vehicle and caravan in the coupled travel condition, ideally with axle groups identifiable.
- Caravan wheels while coupled: this measured wheel load helps compare the caravan’s travel condition with its GTM rating.
- Caravan uncoupled: support the jockey wheel on the weighing platform as directed so the complete loaded caravan mass can be measured.
Do not invent a number where the platform layout cannot isolate it. Ask the operator to explain what each ticket includes, then label every result immediately.
Interpret the results as a system
Compare like with like. A measured loaded caravan mass can be compared with ATM; a measured caravan-wheel mass with GTM; a loaded tow vehicle mass with GVM; and measured axle loads with their axle ratings. Ball load may be measured directly with suitable equipment or derived only where the measurement method supports it.
Check every limit. Passing the GCM comparison does not prove the tow vehicle is under GVM or its rear axle rating. Passing ATM does not prove the caravan axle group, tyres, coupling or tow vehicle are within limits.
Turn a failed margin into a controlled change
If a limit is exceeded or the remaining margin is too small, change one thing at a time: remove weight, redistribute within manufacturer guidance, change tank levels, relocate an accessory or obtain qualified advice. Reweigh after material changes. Moving weight can improve one limit while worsening another, especially front/rear axle distribution and tow-ball load.
When to reweigh
Recheck after adding batteries, solar, boxes, bikes, a generator, larger tyres, suspension changes or other significant accessories; after changing the tow vehicle; and when your typical travel load changes. Keep dated tickets and notes so you can compare like conditions.
Registration and inspection requirements differ by jurisdiction and circumstance. For example, Service NSW identifies situations where a weighbridge ticket may be required for registration. Check your own state or territory authority for current requirements.
Take a prepared worksheet with you
Find the weighbridge sequence, result interpreter and loading tools in the Weights & Towing collection.
Safety boundary: General Australian information only, reviewed 10 August 2026. A weighbridge result does not replace the manufacturer’s instructions, current law or qualified engineering advice.