How to Weigh an RV at a CAT Scale
A CAT Scale turns towing guesses into measured axle weights. The value is not the ticket itself; it is knowing which weighings to compare and which ratings those numbers must stay under.
Load the rig exactly as you travel
Fill fuel to a normal travel level, carry passengers, pets, food, tools and camping gear, and load the trailer as it will be used. A scale ticket from an artificially empty setup can create false confidence.
Position each axle group on a separate platform
CAT Scale platforms are divided so the steer axle, drive axle and trailer axles can be reported separately. Pull forward slowly until each axle group is on the correct platform, then stop straight and centered.
Use a second weighing to isolate trailer load
For travel trailers and fifth wheels, a second ticket with the trailer disconnected can help estimate the load transferred to the tow vehicle. The difference between tow-vehicle weight hitched and unhitched is useful for understanding tongue or pin load.
Do not stop at one headline number
Being under GCWR does not guarantee the setup is within every limit. Check steer and drive axle ratings, trailer axle ratings, GVWR for each vehicle, tire capacities and any receiver or hitch limits.
Use the scale result to improve estimates
Once actual loaded weights are known, update payload and tongue-weight assumptions in your calculators. That makes future route and cargo decisions more realistic than relying on brochure dry weight.