GVW, GCW, tare and payload: read truck weight figures correctly
GVW, GCW, tare and payload: read truck weight figures correctly
Separate the mass of one vehicle from the mass of a combination, and identify what is included in empty weight before calculating a payload allowance.
Identify the meaning and scope of each figure
Weight terminology can vary between a brochure, a registration document and a weighbridge record. Read the original label and check whether the number is an actual measured mass or a stated limit. Keep the vehicle, configuration and unit attached to every value.
| Term | What it describes | What to confirm |
|---|---|---|
| GVW / GVM | Gross mass of a single vehicle, including its load. In a specification, the number may be a stated maximum. | Is it a measured mass, a technical rating or a permitted registered mass? Which complete vehicle? |
| GCW / GCM | Gross mass of the complete vehicle combination, such as a tractor and its loaded trailer. | Which tractor, trailer, coupling and axle limits apply? It is not cargo payload. |
| Tare / kerb mass | A stated unladen or empty-vehicle mass under a particular measurement convention. | Does it include the body, fuel, driver, tools and options? Do not assume all documents include the same items. |
| Payload | The cargo carried, subject to the applicable mass and component limits. | What ready-to-work vehicle mass and load distribution were used? What limit controls? |
- GVW/GVM and GCW/GCM refer to different scopes; do not replace one with the other.
- A brochure weight does not establish the limits that apply to a particular vehicle in its destination.
Calculate a mass allowance, then check the limiting components
For a rigid truck, start with a confirmed permissible gross vehicle mass and the mass of the finished vehicle ready for work. Use the same units and include everything that is not cargo exactly once.
- Use a weighed or properly documented completed vehicle, including body and fitted equipment.
- Account for the operating fuel, people and equipment that are absent from the starting weight.
- Then check each axle, tyres, chassis, body, hoist and load distribution. Any more restrictive limit reduces the usable cargo allowance.
This subtraction is a screening calculation, not a payload approval. For a tractor–trailer combination, account for the entire ready-to-work combination and its gross, axle, coupling and trailer limits; subtracting the tractor tare alone is insufficient.
Read the SHACMAN brochure examples without mixing columns
The 3000 Series brochure lists an X3000 6×4 dump-truck column labelled GVW 50 t, and a separate X3000 6×4 tractor column labelled GCW 90 t. These figures describe different applications and scopes. Neither is a statement that the truck carries 50 t or 90 t of cargo.
- The dump-truck reference needs the finished body and operating mass before any payload allowance can be calculated.
- The tractor reference needs the selected trailer and the complete combination mass and limits.
- Never subtract the tare of a regional truck from a different brochure column to publish a new payload figure.
Ask for a weight record that can be checked
Keep the mass evidence beside the final configuration. If the supplier changes the body, wheelbase, fuel tanks or equipment, review the calculation again before accepting the configuration.
- Exact vehicle and body identity, configuration date and units.
- Source and meaning of each gross-mass limit, including destination and operating context.
- Empty/operating weight with an explicit list of included fuel, people, tools and equipment.
- Loaded axle distribution and the limiting tyre, chassis, body, coupling or trailer ratings.
Reference material and scope
Publisher: SHACMAN. 3000 Series product brochure, X3000 tractor and dump-truck tables, PDF page 24 (printed pages 41/42). The GVW 50 t and GCW 90 t examples come from separate labelled columns; archived tables reviewed on 21 September 2026.
Term explanations and the subtraction above are procurement guidance. They do not determine country-specific legal limits or approve a vehicle payload. Confirm the terminology and limits in the exact vehicle documents.
Check the full reference tables
Make the next step specific.
Describe the job, destination and requirements so the configuration can be discussed together.
SHACMAN DUMP TRUCK