Introduction
Manhole covers are a crucial part of underground drainage. They are typically found on roads, sidewalks, car parks, industrial sites, houses or commercial buildings. These accessories provide access to underground vaults and are needed in order to access, clean or maintain underground drainage and services. Finding the most suitable cover is important and should be based on a number of criteria.
What are manhole covers?
Manhole covers are heavy duty accessories used to cover access chambers to underground services, and drainage. They serve to give authorized access to underground chambers as and when required.
Manhole covers typically consist of a variety of materials including cast iron and ductile iron, steel, concrete and composite materials. Covers can be supplied according to their application which includes the loads that they can be exposed to.
Types of Manhole Covers
There are different types and varieties of these covers and they can be selected depending on the application:
1. Cast Iron Covers
Cast iron covers are ideally suited to domestic, drainage or commercial uses. Such covers are known to resist most types of abrasions and are suitable to be used provided load ratings are known.
2. Ductile Iron Covers
Ductile Iron covers are typically used in commercial or road, highway, industrial or commercial applications. Covers are available in a variety of loadings and can be specified according to individual needs or requirements.
3. Steel Covers
Steel covers are suitable for selected industrial, commercial applications. Various Steel cover grades can be used and can also be provided with suitable coatings depending on their desired application. Covers are ideally suited as to their intended loading in addition to environmental and corrosion resistance.
4. Concrete Covers
Concrete covers are best suited for use in selected drainage and utility applications. Covers possess good and unique characteristics that make them ideally suited for particular requirements. Weight, ease of installation, and load bearing strength should be taken into account when using these materials.
Benefits of using the right Manhole Covers
Selecting the right covers has a number of benefits:
1. Improve Safety
Installing a suitable cover reduces the chances of accidents on sites such as roads, sidewalks, foot paths or car parks. Safety is also improved since there is minimal or no risk of unauthorized access to underground utilities or drains and for pedestrians and vehicles.
2. Durable
Using the most suitable cover improves the service life of the product. It is crucial to purchase and install products that have appropriate load ratings. In addition to this, the overall material selection and maintenance in place will also play a role and contribute to a product`s life.
3. Protection of underground utilities
Installing a suitable cover or any underground utilities, services or sewers helps to prevent litter, dirt and other materials that might find their way into the access chamber or service opening thus compromising its proper functionality. They also deter vandalism or unwanted access to such vital utilities.
4. Reduces servicing and cost of maintenance
Acquiring the most suitable product minimizes servicing and maintenance costs. As much as regular servicing is necessary, purchasing a durable material with the ideal loading capacity will have lower maintenance costs in the long run.
5. Easy access for inspection of underground utilities and drains
Installations on access covers make it possible to access drains, utility chambers for cleaning or inspection and maintenance activities. Inspections and maintenance should ideally be carried out at regular intervals so that any form of malfunction or breakdowns are detected and mended in time.
Conclusion
Manhole covers play a significant role in maintaining the general safety of a given property or site. Understanding the basic materials, application requirements, load bearing and size can enable one to make better purchasing decisions. They also reduce risks or threats from underground utilities, services or drainage that may compromise the safety of a given site, property or building.