What is the minimum opening width required for a manhole?

The standard minimum opening width required for a manhole is 32 inches. This dimension ensures that maintenance personnel can safely access, maneuver, and perform repairs or inspections within the manhole. A 32-inch opening provides adequate space for equipment and allows for efficient operation while ensuring the safety of those working inside or around the manhole. It also helps in accommodating different sizes of workers and the tools they may need to bring in, contributing to a safer working environment. This guideline is often established in building codes and safety regulations.