Why are manhole covers all round?

Because the round cover is not easy to tilt. Well covers are not only round, but also square and triangular.

Well covers are generally divided into round and square.

In urban road management, circular manhole covers are generally used because they are not easy to tilt and can better protect the safety of pedestrians and vehicles.

In rural areas and cable wells, they are generally square, which can better prevent rainwater and other liquids from entering.

Extended data:

Performance characteristics:

1, high strength: magnesite test, high compressive strength, bending strength and impact strength, and good toughness. After long-term use, the manhole cover will not be crushed and damaged, and the "urban black hole" accident can be completely eliminated.

2. Beauty: the surface pattern of magnesite manhole cover is beautifully designed, with bright and adjustable colors, beautifying the urban environment.

3. Easy to use and light in weight: the weight of the product is only about one third of that of cast iron, which is convenient for transportation, installation and emergency repair, and greatly reduces the labor intensity.

4, anti-theft: magnesite manhole cover has no recycling value and is naturally anti-theft; According to the needs of customers, it is equipped with a locking structure to realize the anti-theft of property in the well.

5. Strong weatherability: Through scientific formula, advanced technology and perfect technical equipment, the magnesite manhole cover can be used normally at -50℃ ~+300℃.

6, acid and alkali resistance, corrosion resistance, wear resistance, vehicle crushing resistance, long service life.

References:

Baidu encyclopedia-manhole cover