How do you measure a manhole?

Posted on September 26, 2022

When it comes to manholes, how do you know how big to make them? It may seem like a simple question, but there is more to it than meets the eye. Let’s break down what a manhole is, how to measure them, and what their standard sizes typically are.

What is a manhole?

A manhole is a term used to describe an access point to an underground utility or sewer system. Manholes are typically round in shape and range in diameter from three to six feet. They are equipped with a ladder or rungs that allow personnel to safely enter and exit the manhole. 

In addition, manholes are typically outfitted with a lid or cover that helps to prevent unauthorized entry and protect individuals from falling into the hole. Manholes provide critical access for maintenance and repair work on underground utilities and sewer systems. Without them, these essential services would be significantly more difficult and dangerous to maintain.

How do you measure a manhole?

Measuring a manhole is a relatively simple process, but it’s important to get accurate measurements to ensure that the manhole will fit properly. 

The first step is to measure the diameter of the hole. This can be done with a tape measure or a ruler. 

Next, measure the depth of the hole. This is important because manholes come in different sizes, and you need to make sure that the one you select will be deep enough to reach the bottom of the hole. 

Finally, measure the width of the hole. This will ensure that the manhole you select is wide enough to fit over the hole. When you have all of these measurements, you can then choose a manhole that is the right size for your needs.

What is a standard manhole diameter?

Manholes are an important part of any stormwater or sewer system, providing access to the underground pipes for maintenance and repair. But what many people don’t realize is that there is a wide range of manhole sizes to choose from. 

The most common manhole size is 42 inches in diameter, but sizes can range from 36 inches all the way up to 96 inches. The size of the manhole must be appropriate for the type of pipe it will be connecting to, as well as the amount of traffic that is expected. 

For example, a smaller manhole might be adequate for a residential street, but a larger one would be needed for a highway. In addition, the depth of the manhole must also be taken into account. A shallower manhole might be suitable for a low-lying area, while a deeper one would be needed in an area that is prone to flooding. 

With so many factors to consider, it’s no wonder that choosing the right manhole size can be a challenge. However, with a little bit of planning, any stormwater or sewer system can be properly outfitted with the right manholes for the job.