Usually just the one big scale for scrap steel and have smaller scales for other metals in my experienceNot hard at all. You go to the scrap yard and park on the scales, they tell you to pull forward, unload the truck and then pull back around to the scales and then go pick up a check from the office. If you're gonna separate it by metal type you'll have to roll over the scales several times after you unload each metal type but otherwise it is really painless.