Yes. Weigh the steers and drives together (as long as both fit on the scale) then weigh trailer's seperately. Add the two and that's your gross vehicle weight. If your scale is really small you may have to weigh steers, drives, trailers separately then add those3 together for your gross weight.
Yep, some drivers will not have a clue what you are talking about. Even some giving advice in this thread. If they had read your posts they would understand that sometimes a truck fits on the scale and sometimes they don't. We have that same issue with the scale we use, but, only with a 53 foot trailer with axles all the way to the back. Keep it simple like you were talking about. weigh the tractor only then weigh the trailer axles only and add them together. I could not understand how this thread got to be 2 pages long.
If the truck is to long, have them pull just tractor (steers and drives) onto the Center of the scale. Then have them pull up and have only the trailer axles on the scale. Add the 2 number together and thats total weight. Its that simple. If there is a readout on the scale you should not need to tell drivers specific axle weights since they can figure it out on their own if they want it. If they fail to properly adjust their trailer axles, or failt o check axle weight themselves, that's there problem. If your loaders distribute the load correctly, the total weight is the only one you need to worry about.