The three weight lines
Steer axle is the tow vehicle's front axle. Drive axle is the tow vehicle's rear axle. Trailer axle is the combined weight carried by the trailer axle group. Add the three lines to get the gross weight of the combination on the scale.
Why one ticket may not tell the whole story
One loaded, hitched weighing shows actual axle loads, which is extremely useful for checking axle and combined weights. To understand tongue weight or the effect of a weight-distribution hitch more precisely, multiple weighings can be helpful.
A useful three-weigh approach
One common approach is to record the combination with the weight-distribution system engaged, then reweigh with the spring bars disengaged while remaining hitched, and finally weigh the tow vehicle without the trailer. Those measurements let you compare how load moves between the front axle, rear axle and trailer axles.
What to compare the ticket against
Compare measured steer and drive axle loads with the vehicle's axle ratings, the tow vehicle weight with GVWR, the trailer axle/load information with the trailer's ratings, and the full combination with GCWR when a GCWR applies. A passing gross total does not automatically mean every axle is within its own limit.
Weigh the way you actually travel
For the most useful result, weigh with normal passengers, fuel, propane, water and cargo loaded as they would be for a trip. A lightly loaded scale ticket may not represent your real towing condition.
Frequently asked questions
What do steer, drive and trailer axle mean on a CAT Scale ticket?
Steer is the tow vehicle front axle, drive is the tow vehicle rear axle, and trailer axle is the weight carried by the trailer axle group.
Can I calculate tongue weight from one CAT Scale ticket?
A single ticket shows axle loads, but multiple weighings are usually needed to isolate tongue-weight transfer more accurately.
Should I compare only the gross weight?
No. Check individual axle loads and vehicle/trailer ratings as well as the overall combined weight.