VNDOC
If we ask anyone with a pilots licence if total weight is the only thing of concern, I believe they will advise that weight balance is also important. I know I have been on commercial flights when some passengers have been asked to move forward or back to meet weight balance.
Now to your specific question. Yes the total weights are important but the tires on the right side of your trailer don't know the load on the tires on the left. If you have a 60/40 side to side to side weight distribution on your 7,000 lb axle and you load the RV to have a total of 7,000 on the axle you may think you are not overloading your tires because your tires are rated at 3042# each but the 60% side is being asked to carry 4200#.
"Corner Loads" on motor homes would be RF, LF, RR & LR
If you have a multi axle trailer then you also have variation axle to axle as not all axles carry an equal distribution AND they also can have diferent loading right side vs left side.
If you go to large Rally you may hear about RVSafetyEducationFoundation offering to provide individual corner weights. They do analysis and based on the tens of thousands of RVs they have checked over 55% have either a tire or axle overloaded.
Is it any wonder that 18% of RV owners have had some form of tire failure in the last two years according a recent survey.
If you follow the link I provided you can read the background to my request.
