Reasons for designing the manhole cover into a circle: 1, not easy to fall; 2, not easy to damage; 3, easy to carry and move; 4, reduce the occurrence of hazards.

Careful observation, in life, on the roads, we see that the manhole covers are all designed to be round. Why? Let’s explain it to you.

Detailed content

01

Not easy to fall: the largest feature of a circle is the distance from the center to each side. When the circle cap is placed on the top of the well, it can be completely overlapped so that the cap does not fall to the bottom of the well. If the manhole cover is a rectangle or triangle, the manhole cover and the inlet can not overlap, causing the manhole cover is easy to fall down.

02

Less easily damaged: the force on the entire surface of the circle is equal, and the gravity will be larger. When the wheels run over, the manhole cover remains flat. If it is another shaped polygon, it is not only easy to warp and cause safety accidents, but also cause wear on the edges and corners.

03

Easy to carry and move: The round manhole cover is easy to carry. Since the manhole cover is a heavy large iron block, if the manhole cover is damaged or needs to be replaced, the maintenance worker only needs to roll the manhole cover to move it to the side, which is very labor-saving and more convenient.

04

Reduce the occurrence of harm: the round manhole cover, which causes the sewer mouth to be made round, can reduce the possibility of pedestrians accidentally falling down after the sewer cover is stolen, and can reduce the probability of danger.

05

The round manhole cover setting is the result of a series of comparisons and measurements. The round manhole cover occupies the largest area and saves the most materials.