As on CVEO said in a class I took on what is / is not legal weight wise here in Wa St. Manufactures warranty ratings are performance ratings, for warranty purposes ONLY! What matters, is you are paid for to the total GVW that you are running down the road at! Axel loads are the key also. You can be under a gvw, over an axel load, and be overweight, get ticketed accordingly.
If you want to run down the road at 100K lbs total, with my old 76 Toyota, it would be legal weight wise...... depending upon how else you had things connected etc, you might be illegal otherwise! They have many many ways of getting an unsafe rig off the road. Weight is not usually what gets one in trouble.
I could go thru a list of items that will get you in trouble worst than weight! Like a battery that is used to get brakes working if disconnected from tow rig. If you use your house batteries, and you were using them all night for heat etc. you get pulled over and they are under 11.5V, you have a failed braking system! That goes against your license, vs weight is a non moving violation, and does not follow you. You can not move until the batteries meet the 11.5+V measurement.
If your brakes on the trailer will not hold your truck starting out in first gear, or at least are not locked up, you have a failed braking system. You can not move your rig until the brakes work on the trailer.
I can go on and on on how you can get yourself in trouble, All of these latter issues, again, go against your driving record, insurance etc. DO NOT WORRY about weight amounts! assuming you have a paid for license above what you weight. Even then, like in my case a few times, where I was 500-1000 over, I got a 10 day up the license by a ton, $15 more in registration fees. Whooooppy doooo! I continue on my way down the road! I will also point out, I was under the axel weight limits for my truck(s) and trailer(s).
Marty