Only when the load is close to legal limits, then I will scale to verify the weight and the correct amount of weight per axle. I have a 2 axle ( 33,000GVWR ) straight truck.
More likely quite a bit less, no way possible to legally get over 54,000 on a three axle truck and that would be with a heavy front axle and tires, the more likely scenario is 46,000, 12K on steer and 34K on a tandem drive axle.
To answer the OP, not much scaling needed unless you just want to make sure the steer axle isn't overweight.
You have to be careful with a 2 axle straight ... Most states limit the drive axle to 20,000 Lbs., so even if your GVWR is 33,000 Lbs., your legal max is typically 32,000 Lbs.
Some of the bigger straights with a drop axle are actually over weight on the steers even empty, just too much weight with a big sleeper. Usually get by with it because usually axle and tires usually don't get scunitized at the scale house.