An electrolytic cathode assembly includes a hollow hanger bar, and a deposition plate including an upper edge attached to the hanger bar. The hanger bar can be formed substantially of copper. At least one supporting element can be configured to support the hanger bar. The supporting element(s) can be internally disposed within the hanger bar, and can extend partially between bar ends of the hanger bar. The supporting element(s) can include first and second supporting elements, with each disposed adjacent to a respective one of the bar ends. The hanger bar can include an overhanging portion, and the supporting element(s) can be at least partially disposed within the overhanging portion. The supporting element(s) can include an inward end that is offset inwardly relative to the plate edges of the deposition plate.