Self-leveling manhole covers offer a sophisticated solution to the persistent problem of sunken or protruding manholes. When constructed from ductile or cast iron, these systems adhere to the stringent requirements of the EN124-2 standard to ensure their strength, durability, and safety. The key to their design is an upper frame designed to move with the road surface, dynamically adjusting to shifts caused by frost heave or long-term settling. This “floating” capability is beneficial not just for the life of the installation but also ensures easy installation, as the frame can be precisely matched to the road grade, even accommodating up to a 5º slope. This prevents the cover from becoming a hazardous depression or a jarring bump, thereby enhancing road safety and driving comfort.