In addition to having less maintenance space than square manhole covers, circular manhole covers offer the following advantages compared to square ones:

Circular manhole covers have fewer sharp edges and are more aesthetically pleasing than square ones.

2. Round manhole covers maintain balanced force, reducing noise generation.

3. Circular manhole covers have higher load-bearing capacity than square ones, are less prone to tilt, and offer better protection for pedestrians and vehicles.

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4. The performance of circular manhole covers is superior to that of square ones. Roadway manhole covers are constantly traversed by vehicles and pedestrians. The diameter and length of the circular manhole cover passing through its center are the same. Regardless of how it is rolled, the diameter of the manhole cover will be slightly wider than the opening below, preventing it from falling into the hole. Square manhole covers have diagonals that are significantly longer than their side lengths. When rolled up, they are prone to falling into the hole along the diagonal of the opening, posing a safety hazard.