How to read weight figures and examples
- Ratings are maximum limits, not measurements of your loaded setup. Confirm the exact variant and approved ratings.
- Measure loaded coupling weight. A percentage or the difference between ATM and GTM ratings does not establish today's coupling weight.
- An added load changes both axle reactions according to its position. A change is not a total axle load; use measured starting axle weights and add each load once.
- Combination mass is unhitched loaded vehicle plus total loaded trailer, or the sum of all coupled axle readings. Count coupling mass once.
- Examples and AI suggestions are planning aids, not verified measurements or compliance clearance. Unknown figures require measurement; active weight-distribution hitches and gooseneck arrangements need their own assessment.
The Importance of Weighbridge Documentation
A weighbridge certificate is the only way to know your actual vehicle and caravan weights. Estimates are often 20-30% inaccurate, putting you at risk of non-compliance and safety issues.
What is a Weighbridge?
A weighbridge is a large-scale weighing system used to measure vehicle weights accurately. Public weighbridges are available at truck stops and rest areas, waste transfer stations, grain silos and agricultural facilities, and some service stations.
Types of Weighbridge Tickets
Gross Weight: Total weight of vehicle (or vehicle + caravan) on all wheels.
Axle Weights: Individual weight on each axle (front and rear).
Tow Ball Mass: Downward force on the tow ball (requires special procedure).
Why Weighbridge Results Matter
Safety: Actual weights reveal overload conditions that affect braking performance, steering control, suspension effectiveness, and tyre safety.
Insurance: In case of an accident, insurers may request weighbridge certificates and deny claims if vehicle was overloaded.
How to Get Weighed
Vehicle Alone:
1. Drive onto weighbridge
2. Ensure all wheels are on the platform
3. Record gross weight
4. If possible, get individual axle weights
Vehicle + Caravan:
1. Drive combined rig onto weighbridge
2. Record total combination weight (for GCM check)
3. Drive caravan off, leaving tow vehicle on bridge
4. Record tow vehicle weight (for GVM check)
How Often to Weigh
Weigh before your first major trip after modifications, annually or before long tours, and after adding or removing significant accessories.
**Start a Risk Scan** to assess your setup before visiting the weighbridge.
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