The use of composite manhole cover is generally selected according to the location, and the specifications required in different locations are not the same, so what is the reason for the different thickness of composite well covers?
Well cover is of course important. Sometimes we can see a big hole on a big road or sewer, and this hole is because the well cover is stolen by some people who are greedy for cheap and have no conscience. After stealing, they will sell and earn some money. However, they don't know that this brings great inconvenience to our lives. Maybe it's because of the loss of the manhole cover that some driving people don't notice and fall into the hole, which is very dangerous. At the same time, if the manhole cover above the sewer is stolen, there may be a big smell floating in the air, There is certain pollution to the environment.
However, although the compound manhole cover sacrifices itself, it can ensure the driving safety of the citizens very well. Because there is no metal component in it, it has not much theft value, its strength is very high, and its service life will be relatively long. If the thief wants to steal a little steel bar from it to sell, it is very difficult, so it is very good to choose this kind of compound manhole cover.
Well covers are thick and thin depending on the diameter you need and the bearing pressure. It's as thin as 4cm. It's as thick as 20cm. It's enough to use D400 / E500's 12-15cm thick for ordinary road driving. C250 shall not be less than 30mm for residential area; D400 shall not be less than 50mm for urban road; E600 shall not be less than 50mm for freight station and wharf; f900 shall not be less than 50mm for airstrip.