The expansion means all five of Stephenson’s full service Pennsylvania locations now represent National Crane.
Dennis Heller, president and CEO of Stephenson Equipment, said: "Extending our footprint from Philadelphia to Ohio will help us to better serve the natural gas, construction and power industries."
Mr Heller said it would also allow Stephenson to increase its presence with factory-trained technicians, have a larger parts inventory across the state and a wider area for on-site service.
National Crane branded boom trucks have 8t-40t lift capacities.