It's standard procedure at most outfits to get weighed immediately after taking on a load. You have an overall weight limit on the full vehicle, but you also have individual axle weight limits, and after taking on a load under the legal limit, you may still need to "slide your tandems" to re-balance your weight.

So.. you're almost always going to stop at a "CAT scale" and get a "weight ticket." You're going to hold onto that ticket because if you do get stopped at a state checkpoint, and they show your weight differently than the scale ticket, the scale company will cover the cost of your ticket if their scale was in error.

Most companies will either make this a policy or will _very_ strongly encourage their drivers to always get a scale ticket.