• Ductile iron.
• Non-slip surface.
• Black paint.
• Locking closure.

Class： C250/D400

This type of manhole cover: Its stable structure and strong load-bearing capacity make it suitable for various roads and places, including high-traffic traffic arteries and sidewalks. Its durability and easy maintenance reduce the cost of urban management.

Features

The design of the octagonal frame for the round ductile iron manhole cover is mainly based on the following reasons:

Enhancing Stability and Firmness

Compared with the ordinary circular frame, the structure of the octagonal frame has more contact points with the surrounding area of the manhole. When subjected to the rolling of external forces such as vehicles, it can more evenly disperse the pressure to the surrounding area. This can reduce the concentration of local stress, prevent the manhole cover from being displaced or deformed due to uneven force, enable it to be installed on the manhole more stably, and improve the use stability under complex traffic conditions.

Facilitating Installation and Positioning

During the installation process, the unique shape of the octagonal frame makes it easier for construction personnel to quickly and accurately position the manhole cover, ensuring that it fits perfectly with the manhole. Moreover, when the manhole cover needs to be opened for inspecting and repairing underground facilities and then placed back, the design of the octagonal frame also allows construction personnel to more conveniently reset the manhole cover, reducing installation errors.

Improving Aesthetics and Recognizability

From an aesthetic perspective, the octagonal frame breaks the monotony of a single circle, adding a unique visual effect to the manhole cover and making it more recognizable in the urban environment. On the road, this special appearance is more likely to attract the attention of pedestrians and drivers. To a certain extent, it can remind them to pay attention to the position of the manhole cover, avoiding damage to the manhole cover due to negligence or causing traffic accidents.

Optimizing Mechanical Properties

The shape of the octagonal frame makes the force transmission path of the manhole cover more complex and reasonable when it is subjected to external forces. It can better resist impact forces and shear forces from different directions. While ensuring the strength of the manhole cover itself, it can also effectively extend its service life, reducing the maintenance cost and the impact on traffic caused by frequent replacement of the manhole cover.

Anti – theft Design Consideration

Compared with the simple circular frame, the structure of the octagonal frame is relatively complex, which increases the difficulty for lawbreakers to pry and steal the manhole cover with simple tools. To a certain extent, it plays an anti – theft role and ensures the safety of public facilities.

Application

The round ductile iron manhole cover with an octagonal frame has the advantages of high strength, good toughness, and strong anti-theft performance. Here are some specific application scenarios:

Urban Roads

Under the surfaces of urban arterial roads, secondary roads, and branch roads, there are various pipelines such as water supply and drainage pipes, gas pipelines, power cable pipes, and communication optical cable pipes. The round ductile iron manhole cover with an octagonal frame can withstand the frequent rolling of passing vehicles, ensure the normal operation of various pipelines. At the same time, its circular design can prevent the manhole cover from falling into the wellhead, and the octagonal frame, to a certain extent, increases the visual recognition with the road surface, preventing vehicles from damaging the manhole cover due to failure to avoid it in time.

Residential Communities

It is used for sewage wells, rainwater wells, septic tank wells, etc. in residential communities. It can bear the load of private cars, small trucks, and other vehicles that travel daily in the community. Meanwhile, its good anti-theft performance can effectively prevent the theft of facilities in the community and ensure the safety of the living environment of residents.

Commercial Areas

In places such as commercial squares and pedestrian streets, there is a large flow of people and vehicles. This kind of manhole cover not only has to bear the pressure of vehicles but also has to withstand the frequent trampling of pedestrians. The anti-slip pattern design on its surface can reduce the risk of pedestrians slipping and ensure the traffic safety in commercial areas.

Schools and Hospitals

Places such as schools and hospitals have relatively high requirements for safety and the environment. The round ductile iron manhole cover with an octagonal frame has good stability and safety, which can ensure the traffic safety of special vehicles such as ambulances and school buses. At the same time, it has a relatively good mute effect, which can reduce the noise generated when vehicles pass by and create a quiet environment for schools and hospitals.

Industrial Parks

In industrial parks, there are frequent entries and exits of heavy machinery vehicles and large transport vehicles, so there are extremely high requirements for the load-bearing capacity of manhole covers. The round ductile iron manhole cover with an octagonal frame, with its excellent strength and toughness, can effectively withstand the rolling of heavy-duty vehicles, and protect the normal operation of industrial pipelines, cables, and other facilities in the park.