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Manhole
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Definition
A vertical shaft that provides access to underground utility systems for inspection, maintenance, and repair. Typically constructed of precast concrete with a cast iron frame and cover.
Frequently Asked Questions
What are the standard sizes for manholes?
Common manhole diameters range from 48 to 72 inches, with larger sizes used for deeper installations or where multiple pipes converge.
How often should manholes be inspected?
Manholes should be inspected annually for structural integrity, infiltration, and proper function of steps and covers.
Conclusion
Manholes are essential access points for maintaining underground infrastructure and must be properly designed, installed, and maintained.
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