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any truck scale will have a allowed +/- weight wise. Its very difficult to get an accurate weight on trucks down to the pound that can come across weighing 20 tons or more.
Most scales you will find that they will be +/- 10-50 pounds depending on age. The scale at my yard is brand spanking new. Last one got hit by lighting. The old one was +/- 20 pounds and the new one is +/- 10 pounds.
Just keep a record of your weight. Remember that gas / other things can add or subtract weight depending on how full or empty your tank might be.
Even super accurate scales will be +/- a specific ammount of weight to account for humidity, temp, and other atmospheric conditions.
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there are a few yards around me that screw people around with their scales. i took a whole bunch of parts from work in, 2500# worth, and the only yard here that i could get rid of them at without pulling them apart was shady as the day is long, weighed my stuff where i couldnt see the readout, and if it didnt weigh 2860 i would have been really upset. either way im not going back there. im with sirscrapalot, even if they give me the low side of it im out maybe a buck on average, not worth the headache especialy when you have a good yard to go to. start complaining about something that minor and they might not be so friendly next go round. off by a hundred pounds or the non ferus scale off by 20, that would have me upset.
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My yard goes by 20s to, I just figured that the loaded weight and tare weight were rounded the same way, I didn't see the post about the trays but I don't see anything wrong with throwing them in, I'm all the time throwing in shrouds, carpet, dash pads seats, heck anything that came out of a car into another car, it's just part of breaking down sometimes you miss some things in your clean up nothing wrong with throwing it in the next car, fridge, computer case or whatever your breaking down, just my opinion
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I have no idea how scales work or are calibrated but I always wonder about the smaller, second yard I use. Sometimes things just seem wayyyyyy off. I took a fridge in the other day and it was heavy as heck and they said it only weighed 127 lbs. no friggin way that was accurate but what can I do?
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hmm the yard i got to for cars doesn"T bounce at all the litle itron /steel bs does and i have tare weight on copper /aluminum/acr stuff so it"s nbot measrued with truck
not that it matters i pre weigh on my scal;es vs theirs