How much weight can a tandom axel dump truck carry in Ohio?

Under the federal bridge law, a tandem is allowed to gross 54,000. According to Chapter 5577.04 of Ohio's law, it would seem to reinforce this, as the maximum allowed weight of any single axle is 20,000 lbs. (provided it has the correct size tyres) and the maximum for a set of tandems is 30,000 lbs.

For a tandem dump truck, this is typically 15 to 16 tons of payload, depending on the tare weight of the vehicle.