RV weight ratings: GVWR, GAWR, GCWR and cargo
GVWR limits one loaded vehicle, GAWR limits an axle, and GCWR limits the loaded combination. CCC and OCCC describe cargo or occupant-and-cargo allowance from a defined baseline.
None is a measurement of the RV as packed today. Compare each rating with the corresponding loaded measurement.
Match the term to the load
| Term | Meaning | Compare with |
|---|---|---|
| GVWR | Manufacturer’s maximum loaded vehicle rating | Actual loaded vehicle total |
| GAWR | Maximum load rating for the identified axle | Actual load on that axle |
| GCWR | Maximum loaded combination rating | All combination axle loads summed once |
| UVW | Unloaded weight under the stated definition | A starting condition, not packed trip weight |
| CCC | Cargo allowance under the applicable label | Cargo added beyond that baseline |
| OCCC | Occupants and cargo carrying capacity | Occupants and cargo under the actual label |
| Hitch rating | Limit for the hardware and operating mode | Trailer load and vertical load as applicable |
One combination, two ways to double-count it
Suppose an unhitched loaded truck weighs 6,000 pounds, the complete trailer weighs 6,000 and its unadjusted tongue load is 800. Their combined weight is 12,000 pounds. The tongue is part of the trailer’s 6,000 pounds; adding another 800 to the combination would count it twice.
When coupled without weight distribution, the example truck carries 6,800 and the trailer axles carry 5,200. That still totals 12,000. A weight-distribution hitch can change those axle shares while leaving the combination’s total unchanged.
The tow vehicle’s coupled load must fit its GVWR and axle ratings. The complete trailer must fit its own GVWR. A favorable GCWR comparison does not cancel an exceeded rear-axle or hitch limit.
Labels define the allowance
Federal certification rules specify GVWR and axle information on the vehicle label. FMVSS 110 and FMVSS 120 contain the applicable RV cargo provisions. Read the actual label rather than mixing an older brochure’s weight definition with a newer load allowance.
Current RV provisions include full propane in unloaded weight while potable water is cargo. Do not automatically deduct full propane again. Motorhome OCCC combines occupants and cargo; a trailer label does not create capacity in its towing vehicle.
Adding air springs or installing higher-rated tires does not by itself change the vehicle certification rating. For uncertain documentation, ask the manufacturer for the actual vehicle’s requirements. Use weigh an RV on travel-ready scale passes to obtain the matching measurements.
RVSEF’s weighing explanation records the unhitched truck, coupled truck and trailer separately. It compares measured loads with the corresponding label ratings; a combination total alone cannot establish each axle’s status.