Which components make up a standard manhole?

A standard manhole is typically comprised of a lid, cone, barrel, and base. The lid is the top portion that covers the manhole opening and may also include a frame that supports it; this is crucial for safety and accessibility. The cone is a tapered section that connects the barrel to the surface, facilitating the transition from the street or pathway to the internal structure of the manhole. The barrel is the vertical shaft, which can vary in height depending on the depth and location, providing access to the subsurface utilities. Finally, the base is the bottom part of the manhole that connects to drainage systems, providing a stable foundation.

This configuration is essential for proper installation and function, ensuring that the structure can withstand traffic loads while providing adequate access for maintenance and inspection workers. Understanding these components is vital for effective maintenance and management of collection systems.