Three sets of letters. One very expensive mistake if you get them wrong. GVM, GCM and payload sound like compliance jargon. But a recent Trucksales explainer breaks down exactly why they matter. Getting the sums wrong doesn’t just risk a fine. It can void your insurance too.
The piece is worth reading if you’ve ever mixed up the three terms. GVM is what your vehicle can weigh on its own. GCM is what your vehicle and trailer can weigh once hitched up. Payload is what you’ve got left to load, once you’ve accounted for tare weight, fuel and driver. It also covers standard axle weight limits for single, tandem and tri-axle groups, and how those limits shift with dual tyres.
The Detail That Catches Drivers Out
A loaded trailer’s turntable download can eat 4.5 to 6 tonnes of your available payload. That’s before you’ve loaded a single box onto the tray. Factor in fuel, driver weight and sleeper gear, and your rated payload shrinks fast. It’s easy to see how operators end up over the limit without realising it.
Know Before You Load
This is a good companion read to our piece on PBS trucks. Both come down to the same principle: know what your combination is rated for before you load it. Weighbridges don’t care whether you did the maths or just guessed. Getting GVM, GCM and payload right from the outset is cheaper than finding out at a roadside inspection.
Read the full article on Trucksales: Understanding GVM, GCM and payload
