Originally Posted by JackandJanet
I did mine at the local truck stop scale. Cost was $9.00 per weighing. Go in and talk to them before driving up on the scale so you both know what you want and need to do. I think you'll find they will be VERY helpful.
I did two weighings. One with the trailer connected (front and rear axles of the tow vehicle on the first two platforms and the trailer on the third platform), then, I unhitched the trailer so that it and the tongue support were all on the rear platform, with my tow vehicle still on the first two and had the whole mess weighed again.
This way, I got an accurate measurement of the total weight of the trailer, and my tow vehicle weight. Then the additional weight on my tow vehicle's axles with the trailer connected as well as the axle load on the trailer itself in the tow configuration.
If you live anywhere near agriculture, a grain elevator (please dont show up during harvest to weigh your camper) can weigh it, if they are nice and not busy. the grain elevator near me has an ouside readout so I didnt even bother anyone the day I weighed a car with trailer. Of course I am a customer at said elevator, so I get more latitude I am sure.
ALso It would be a simple weight not like Jack got though. And it could be off a bit, they get calibrated each year at least, but debris on the scale could give a little bit off reading (few lbs), since they only care about full minus empty weights or vice versa.
I know I used a feedlots scale once, worried because the scale was covered in cow poop, which could be off a lot. But, it wasn't for checking weight of truck per se, it is to find out gross full weight, minus the empty weights of a grain truck... you weigh in full, dump then weigh empty, to see how much of a commodity I delivered, not how much the truck weighed... LOL I bet there was a half ton of crap on there.