When a VGM Declaration Disagrees With the Terminal Weighbridge
A machinery container weighs heavier than its declared VGM; how the difference is resolved before the cut-off and how the error is designed out next time.
Representative scenario, not a specific client engagement. This page describes how a shipment of this kind is genuinely handled — the constraints, the approach, and where it commonly goes wrong. It does not name or describe a real Transeasy customer. Our two documented project moves are the Mexico container move and the India overweight cargo delivery.
The situation
SOLAS requires the shipper named on the bill of lading to declare a verified gross mass for every packed container before it is loaded, and a container without a VGM is not loaded. Method 1 is weighing the packed container. Method 2 is adding certified cargo, packing and dunnage weights to the tare marked on the container. Both are permitted, and in practice almost every discrepancy comes out of a Method 2 calculation.
Machinery is where that arithmetic drifts. A catalogue weight excludes the fluids, the counterweight, the spare parts crate and the steel frame the machine is bolted to. Timber cradles, lashing, chocks and strapping add several hundred kilogrammes between them. The tare on the plate may not match the box actually supplied. Where the terminal weighbridge reads materially above the declaration, the terminal raises the difference and the container is held pending a corrected figure.
What made it difficult
- The VGM obligation sits with the shipper named on the bill of lading and is not transferred by asking a forwarder or haulier to lodge it.
- Terminals apply their own tolerance, so a difference beyond it stops the container even where the true weight is inside the payload limit.
- A corrected VGM has to be lodged before the terminal VGM cut-off, which falls earlier than the container cut-off.
- Road legality at destination is a separate limit, so a box loaded legally for sea can still be undeliverable by truck.
How it is approached
The immediate step is to establish which figure is wrong rather than simply resubmitting the terminal number. Ask for the weighbridge ticket and its calibration reference, then rebuild the Method 2 calculation from source documents: cargo net weight from the works certificate, packing and dunnage weighed rather than estimated, and the tare read from the plate of the container actually used. Most recalculations land close to the weighbridge, and the omission then becomes identifiable.
Where the recalculated figure agrees with the terminal, a corrected VGM is lodged at once against the container and booking numbers, with the weighbridge ticket retained as evidence. Where the box now exceeds the payload marked on its CSC plate or the weight booked with the carrier, cargo has to come out and be redistributed, which means a reworking slot, unpacking, reweighing and a fresh declaration. That decision costs far less taken the same day than at the cut-off.
Where the weighbridge is the outlier, the route is a reweigh. A second weighing on a calibrated bridge, with the haulage unit weighed empty and laden, produces a figure that can be put to the terminal. It does happen: a bridge out of calibration, a weighing taken with the chassis partly off the plate, tractor fuel counted into the cargo. The case is made with tickets and calibration certificates rather than correspondence, and it has to be made before the cut-off.
Designing the fault out is mostly a question of method. Weighing the packed container under Method 1 removes the whole class of problem wherever a calibrated bridge is available, and for heavy machinery that is generally the sounder choice. Where Method 2 is used, the calculation should be built from certified cargo weights, an actual weight for the cradle and lashing, and the tare of the specific box, then checked against an axle-load plan for the destination road leg.
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Takeaways
- Method 2 declarations fail on the items nobody weighs: fluids, cradles, lashing, dunnage and the spare parts crate.
- The VGM cut-off falls earlier than the container cut-off, so a discrepancy found late costs the sailing rather than a correction.
- The duty rests on the named shipper, so a forwarder can calculate, weigh and lodge but cannot assume the obligation.
- For dense, heavily dunnaged machinery, weighing the packed box removes an entire category of dispute for the price of a weighbridge ticket.
Frequently asked
The terminal holds it and asks for a corrected declaration. If the corrected figure is lodged before the VGM cut-off, and the container is within both its CSC payload and the weight booked with the carrier, it loads as planned. If the true weight breaches either limit, the box must be reworked and reweighed, which normally costs the sailing. The tolerance applied is set by the terminal rather than by SOLAS.
The obligation rests on the shipper named on the bill of lading. A forwarder can weigh, calculate, lodge the declaration and hold the evidence, and commonly does all four, but the legal duty is not transferred by that arrangement. Where a forwarder issues its own bill and is named as shipper on it, it carries the obligation for that document. Either way the source weights come from whoever packed the container.
Method 1, weighing the packed container, usually suits machinery better, because the cargo is dense, irregular and heavily dunnaged, which is exactly where an added-up figure goes wrong. Method 2 is equally lawful but needs certified cargo weights, an actual weight for the cradle and lashing rather than an estimate, and the tare of the specific container. Where no calibrated bridge is reachable, Method 2 with weighed components is the fallback.