Preventing HGV Overloading: Gross, Train and Axle-Weight Checks

A vehicle can be below its gross limit and still be overloaded on one axle. A combination can also satisfy tractor gross weight while exceeding gross train weight or a trailer axle limit. The only reliable dispatch decision checks every applicable plated limit and how the load is distributed.

Gross, train and axle weights

• Gross vehicle weight is the maximum permitted weight of the vehicle and everything it carries.
• Gross train weight is the maximum for the towing vehicle, trailer and their loads as a combination.
• Axle weight is the maximum load borne by an individual axle or axle group.

Each can create a separate overloading offence. Use the Department for Transport plate limits where both manufacturer and ministry plates are present in Great Britain, following current official guidance.

Include everything in the real weight

The calculation includes more than goods:

• tractor and trailer;
• driver and passengers;
• fuel and fluids;
• pallets, stillages and packaging;
• straps, chains, sheets and dunnage;
• tail lift, crane or mounted equipment;
• toolboxes and spare equipment;
• residue or material left in body or tank.

Payload figures from a sales brochure may assume a particular specification. Establish the actual unladen/tare position for the working vehicle and equipment.

Do not rely blindly on customer paperwork

GOV.UK warns operators not to automatically trust declared weights, invoices or delivery notes. Ask how weight was established and what packaging is included. Where accuracy matters, obtain calibrated weighing evidence.

The order process should capture:

• commodity and density where relevant;
• unit count and individual weights;
• pallets/packaging;
• loading sequence and position;
• planned collections and drops;
• any customer tolerance or uncertainty.

If the load differs at collection, the driver needs authority to stop and contact the office.

Plan distribution before loading

Legal total weight does not guarantee legal axle distribution. Position depends on load centre of gravity, fifth-wheel position, wheelbase, body design and axle configuration.

Use vehicle-specific load-distribution information or competent calculation. Heavy items concentrated at the headboard can overload the drive axle; too much rearward may overload trailer axles or reduce tractor-axle loading and stability.

Lift or tag axles must be used correctly. Do not lift an axle simply to reduce tyre wear when the remaining axles would exceed their limits.

Multi-drop and diminishing loads

Removing goods changes distribution. GOV.UK load-security guidance warns that a diminishing load can overload an axle even though total weight falls.

Example: a trailer begins with heavy pallets distributed across the deck. The first delivery removes rear pallets, leaving weight concentrated forward. Gross weight is lower, but the tractor drive axle may now carry more than permitted.

Plan the delivery sequence and re-distribution. Tell drivers when goods must be moved and resecured after a drop. If the customer controls unloading, the driver still needs a way to verify the resulting condition before departure.

Weighbridge process

Where uncertainty exists:

1. Use a suitable public, fixed or portable weighing system.
2. Obtain individual axle as well as gross results where possible.
3. Record vehicle/trailer identity, date, time and load condition.
4. Compare with the correct plates.
5. If overloaded, do not continue the delivery.
6. Move only as official rules permit to remove or redistribute load.
7. Reweigh and retain the compliant result.

GOV.UK says a vehicle may drive to the nearest available weighbridge to check and then to a place where excess can be removed if it is overloaded. Apply the current rule carefully; it is not permission to begin a known overloaded commercial journey.

A dispatch weight gate

Keep the weight plan with the job. If the combination changes, recalculate.

Roadside response

DVSA, police or trading standards may weigh vehicles. Follow directions and remain professional. Preserve the weight record, prohibition or notice and job documents. Do not move until permitted and made compliant.

Investigate cause: incorrect declaration, calculation, loading, equipment, vehicle substitution or multi-drop change. Correct the system, not just today’s load.

Secure and legal are separate tests

A load can be securely restrained but overweight, or within weight limits but insecure. Apply both controls. Read the HGV load-security guide for restraint.

Digital job records can join weight, combination, route and ticket evidence. They do not replace weighing or vehicle-specific distribution expertise.

Common mistakes

• Checking gross weight only.
• Confusing gross vehicle and gross train weight.
• Excluding pallets, driver, fuel or equipment.
• Trusting a delivery note without verification.
• Using an assumed tare after body modifications.
• Failing to re-evaluate after a drop.
• Lifting an axle without checking remaining loads.
• Treating load restraint as proof of legal weight.

Frequently asked questions

Can an HGV be overloaded below its gross weight? Yes. An individual axle or axle group can exceed its plated limit.

Which plate should be used? Current GOV.UK guidance says the Department for Transport plated limits apply where both manufacturer and DfT plates are fitted in Great Britain.

Does removing goods always improve compliance? It reduces total weight, but altered distribution can increase load on a particular axle.

Can the customer be made responsible for weight? Contract terms can allocate information duties, but the operator and driver still need to ensure the vehicle is not overloaded.

What evidence should be retained? Load data, calculation, asset combination, weighbridge/axle result, redistribution and compliant recheck where needed.