Discover the practical reasons behind the round shape of manhole covers.
Lifestyle Desk, New Delhi. Seeing open manhole covers on the road, our first thought is about safety . We wonder if anyone might fall into it. Manholes are used for drainage or sewer cleaning, but have you ever thought why manhole covers are always round ? Why not square or triangular? This is a question that perhaps few people think about. Let's find out why manhole covers are always round . The round ness of manhole covers is not just a coincidence but has several practical reasons behind it.
So, why are manhole covers always round? This question often comes to people's minds. Protection from accidents is a major reason, but there are other practical reasons too. Since the manhole itself is round, a round cover is the best fit. Also, a round cover is easy to move from one place to another. Moreover, it requires less material to make and is stronger too. Additionally, the risk of getting stuck in it is less due to its round shape. Besides being easy to move, a round cover is also easy to remove and move around. Due to their round shape, these covers can be rotated, making them cost-effective and better. Despite being heavy, they can be easily moved from one place to another. If they were not round, removing and moving them would be much harder. Why do we call them manholes? In the 19th century, when underground sewage systems were being developed in cities, engineers found the need for pits for regular inspections of these systems. These pits were called 'manholes' because men typically did this work. Due to their round shape, easy access and no obstruction were possible in these pits
Manhole Covers Round Practical Reasons Safety Sewer Inspection
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