That will work if there is only 1 platform. If you go to a truck scales(like a Cat scale) there are 3 sections, you put the front axle of the truck on one, the rear axle of the truck on the second section, and the trailer wheels on the third. After you get the weights, you need to go unhook, then weigh the truck without the trailer. This will tell you the trailer weight, the truck weight, axle weights, and Gross weight. It will also show you if you have the WD bars set correctly. Hope that this helps you.
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