Why Manhole Covers Aren't Usually Square ?

Manholes play a crucial role in urban infrastructure, particularly in the realm of optical communications. These underground access points facilitate the installation, maintenance, and repair of fiber optic cables that form the backbone of modern telecommunications systems. While manholes are essential for ensuring the seamless flow of data and communication, it's interesting to note that manhole covers are predominantly round rather than square. In this article, we delve into the reasons behind this design choice and explore the vital role that manholes play in the realm of optical communications.

1.Cable Protection and Bending Radius: Fiber optic cables, which transmit vast amounts of data at incredible speeds, require careful handling to maintain their performance. Round manholes allow for the necessary bending radius of fiber optic cables, ensuring that they aren't subjected to excessive stress or sharp angles. The circular opening of a manhole offers ample space for cable management, protecting the delicate fibers and maintaining signal integrity.

2.Load Distribution and Structural Integrity: Manhole covers must bear the weight of vehicles, pedestrians, and other environmental factors. The round shape of manhole covers allows for better load distribution. The absence of corners or edges minimizes stress concentrations and prevents potential weak points. This design choice enhances the structural integrity of manhole covers, ensuring their longevity and ability to withstand heavy loads.

FCST-C250-SMC01    Square Manhole

3.Easy Access and Installation: Circular manhole covers offer practical advantages when it comes to access and installation. Their shape allows for quick and convenient removal, making it easier for technicians to enter the underground chambers. Additionally, circular covers don't require precise alignment during installation, simplifying the process and saving valuable time and resources.

4.Safety Considerations: Round manhole covers provide enhanced safety, both for technicians and the general public. Their circular shape reduces the risk of accidents caused by slipping or tripping, as there are no sharp corners to navigate. Moreover, the absence of straight edges on round covers discourages unauthorized individuals from attempting to remove them, improving security and preventing potential hazards.

 FCST-D400-SMC03   Round Manhole

Manholes play a pivotal role in the realm of optical communications, enabling the installation, maintenance, and repair of fiber optic cables that form the backbone of modern telecommunications networks. The predominant use of round manhole covers can be attributed to their ability to protect the cables, distribute loads effectively, facilitate easy access, and enhance safety. Understanding the significance of manholes and their associated cover design helps us appreciate their contribution to the seamless flow of data in the realm of optical communications, ultimately fostering efficient and reliable communication networks in our cities.

FCST - Better FTTx, Better Life.

We have been designing, manufacturing and supplying passive components for fiber optical networks since 2003. Everything we do in FCST is designed to provide efficient, simple and innovative solutions to solve complicated tasks.

We offer 4 solutions

• FTTH ODN Solution

• Underground Cable Installation Solution

• Aerial Cable Installation Solution

• Fiber Tools & Test Solution

As a FTTx solution supplier, we can also do ODM according to project. We will continue to innovate and contribute more to the construction of the global optical fiber network.