Durability of Manhole Covers

The durability of manhole covers can be affected by various factors. Below, HOA BINH sends you some causes that directly affect their durability.

Manhole covers are mainly produced from 2 main materials: cast iron and composite. Every manhole cover product must pass stringent quality inspection upon creation. But sometimes, minor errors during manufacturing, transportation, and installation will also affect their durability.

FACTORS AFFECTING THE DURABILITY OF MANHOLE COVERS

You may not know that **manhole covers** are currently a very popular product protecting the urban underground drainage network. They are usually produced with ductile iron and gray iron materials. However, composite material is also being significantly applied in this field today. Yet not everyone is aware of the factors that affect the durability of the aforementioned manhole cover products.

Manhole covers are metal, composite, or concrete plates that shield entrances to underground sewer systems. They cover the manhole opening and are usually located on the ground surface. Missing manhole covers are an extremely dangerous phenomenon. Causing loss of traffic safety. It is important to quickly replace missing manhole covers.

In addition, **manhole covers** may suffer damage such as:

• Composite manhole cover about to come off, or there are signs of chipping/flaking
• The drain cover opening has sunken.
• Cracks appearing on the surface
• The drain cover is completely damaged

All are due to objective causes in the design technique, manufacturing, and incorrect manhole cover installation for the specified area. Leading to the durability of the manhole cover being affected.

Ignoring the load-bearing principle of the manhole cover based on the installation area greatly affects the cover's durability

In general, the utility of the manhole cover after completion depends on its installation location.

Each manhole cover is designed with a size and shape that must be suitable for each area. Because each location will exert different forces on the manhole cover. The amount of force depends on the type of vehicle, the volume of vehicles, and pedestrians using the road.

This is clearly shown in the European standard BS EN 124.

Manhole cover dents, cracks occurring during transportation

The reason for this situation is that the driver of the transport vehicle does not comply with the vehicle's load capacity regulations. Or the goods arrangement is not up to standard. Causing the products to often collide with each other when delivered to the customer.

Furthermore, when lifting the manhole cover up and down, if the cover is allowed to drop vertically. Meaning the corner hits the ground. Because cast iron covers are heavy, concentrating the force on a small point can easily lead to dents, warping, or cover breakage.

The above is a **summary of factors that can affect the durability of manhole covers** that you may need to know.