I have a friend that lives in Bandon Oregon and there's a weigh station just south of town on Hwy 101. I've never seen any personnel there, but the weight is displayed on an electronic sign. I've gone there and obtained all the weights you're looking for, and it was free. You might call Washington DOT and see if there's a similar setup in your area.
Jon & Chris Everton
1986 40' Dog House #86
0 hp 8V92 Allison HT740
Soon to be 500hp ISM with ZF 6 Speed
I've only weighed in once and used a CAT scale at a truck stop. They weighed each axle but I can't remember if they had the scale split side to side or not. I'm sure others who weight more often will have more specific info.
Most scales don't do side to side splits. CAT scales in particular are usually designed with barricades to keep the truck centered on the scale.
I've had good luck with closed truck scales on the highway - they usually leave the scale on when they're closed and many have a display you can see from the driver's seat.
Usually you can pull through and get a total weight for each axle, then pull around and do it again with only one side on the scale platform. Subtract this side from the total axle weight to get what's on the other side.
You might also check with local household moving companies, or even the county dump. And ask the local DMV office where they send people who need to get their vehicle weight for the title.
1976 Newell Classic (Sold)
Home Base: Riverside, CA
If anyone needs my contact info private message me and I will send it to you.
I have found that the best place to get a weight on each wheel position is to go to a long distance Moving Van Line facility such as United, Atlas, Allied, North American, etc. They frequently have flat scales without any obstruction on one side of them. If you can find one that isn't busy, talk to the scale master, they will frequently let you drive onto the scale one axle at a time, then one axle at a time with only one side on the coach on the scale. The site MUST be level or you will not get good results. Just make sure you don't interfere with them weighing their own trucks and tip the scale master well. He will be happy to see you come back in the future.