Explore A Wide Variety of Manhole Cover Options to Make the Right Choice

Urban infrastructure has evolved drastically over the decades as many technologies and innovations have made their way in the world. But no matter how advanced it has become, some of the key elements have still been a part of it.

A manhole cover is one of them as its use has been always crucial even though they sound like a mundane aspect. These covers serve the purpose of providing accessibility to diverse utility networks developed underground. They include telecommunication lines, sewer systems, electrical cables and other things.

Since manhole covers are found in roads, pedestrian walks, etc. they are designed to withstand the loading of a variety of vehicles and protect people from falls and injuries. The successful completion of any infrastructure project is accomplished when the right manhole covers supplier works closely with the project.

However, having to decide which type of manhole cover is an important decision to make. There are different options available based on diverse factors. In this guide, we will be exploring them and help you on the journey of decision-making for manhole covers.

The Choice of Material Matters

Manhole covers are exposed to many external factors. From harsh weather conditions to things they get in contact with, the exposure can have detrimental impact on them if the right material is not selected.

Some of the common materials are steel, composite materials, ductile iron and cast iron manhole cover. Each material has distinct properties that can be beneficial but they can even pose some drawbacks.

Steel: Manhole covers made from steel provide strength and durability. Adding to their list of benefits, is their lightweight nature that makes them easy to install and even remove when required. They are commonly used in applications where weight is a key concern.

Composite Materials: These include materials such as reinforced plastics. They are known for being anti-corrosive, lightweight and highly customisable. These types of manhole covers are installed in areas where chemical exposure is common. They are also used in areas where theft and vandalisation is a problem as not much can be obtained if someone steals these covers.

Ductile Iron (D.I): Durability, flexibility and strength are the three pillars that define manhole cover D.I. With their impressive attributes, they are a go-to choice in areas where mechanical damage is an issue. They are also capable of withstanding heavy traffic load making them an ideal choice for busy roads.

Cast Iron: Similar to ductile iron, these material made manhole covers offer strength and durability with the added benefit of corrosion-resistance. While they can take the load of heavy traffic, they aren’t a light material and require special lifting equipment for installation and maintenance.

Classification of Load Ratings

Since manhole covers come in contact with heavy traffic and diverse load, the right choice must be determined by considering the different load ratings. The manhole covers are manufactured and assigned specific load ratings to give the idea of how much load it can withstand. These classifications are —

A15: The manhole covers rated with this figure are capable of taking up to a 1.5-ton test load. Typically, this includes pedestrians and pedal cyclists.

B125: Manhole covers rated B125 have the capacity to withstand a 12.5-ton test load. This comprises car parks and pedestrian area manhole covers where only occasional vehicular access is likely.

C250: This rating is given to manhole covers that can take on a capacity of a 25-ton test load. The manhole covers rated with this figure are typically found in car parks, forecourts and areas with slow-moving traffic.

D400: Manhole covers rated with D400 are capable of withstanding a 40-ton test load. The covers can withstand cars and lorries, including carriageways, hard shoulders and pedestrian areas.

E600: This one is dedicated for manhole covers that are able to withstand a 60-ton test load. These types of manhole covers are found in loading areas, docks, etc.

F900: This rating is assigned to manhole covers that are capable of withstanding a 90-ton test load. The common application area is aircraft pavements. 

Different Shapes and Sizes

Next up in the list of different options available is the varied shapes and sizes. The distinct shape and size make them suitable for installation in a specific access point. Here the main criteria to focus are – opening and the surrounding infrastructure.

The common shapes available are —

• Round covers, which are the most widely used. They have the construct that can be rotated for alignment during installation.
• Square or rectangular covers may offer better alignment with sidewalks or pavement edges.

While choosing the right option, it is important to maintain that there’s enough clearance for the cover to open fully without obstruction.

Bottom Line

There are other varieties of options based on the safety features such as anti-skid pattern or lockable cover mechanisms. Moreover, many manhole cover traders take into account the environmental considerations to develop and offer varied options.

Choosing the right manhole cover needs careful consideration of these factors. If you are looking for a wide variety of options to choose from then the Dutco Tennant LLC is a noted supplier to get in touch with.