Features of Manhole – The main parts of a manhole are the chamber or ring and the Vertical Circular Pipe. The vertical circular pipe is available in varying depth and sizes. These pipes are used to access the inspection joints in the system. Manholes are mainly positioned 0.5m away from the curb lines of the road.
- Mostly it is constructed such that it is away from the wheel line of the traffic.
- The cover of a manhole is a plug that protects the manhole from any unauthorized access.
- The covers used for manholes can be either rectangular, square or circular in shape.
- The material of cover can be precast concrete, composite material or any glass-reinforced plastic material.
The provision for access through the manhole is performed through steps. If the depth of the manhole is less than 1 m, a step ladder is constructed. If the depth of the manhole is greater than 2.5m, a regular ladder is fitted. Now modern manholes do not demand physical entry.
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What are the types of manhole covers?
Features of Manhole – The main parts of a manhole are the chamber or ring and the Vertical Circular Pipe. The vertical circular pipe is available in varying depth and sizes. These pipes are used to access the inspection joints in the system. Manholes are mainly positioned 0.5m away from the curb lines of the road.
Mostly it is constructed such that it is away from the wheel line of the traffic. The cover of a manhole is a plug that protects the manhole from any unauthorized access. The covers used for manholes can be either rectangular, square or circular in shape. The material of cover can be precast concrete, composite material or any glass-reinforced plastic material.
The provision for access through the manhole is performed through steps. If the depth of the manhole is less than 1 m, a step ladder is constructed. If the depth of the manhole is greater than 2.5m, a regular ladder is fitted. Now modern manholes do not demand physical entry.
What is the difference between a manhole and a sewer system?
Sewer Basics: Parts of a Manhole Manholes give personnel and equipment access to sewer lines for inspection, testing and cleaning. They are built in areas where there is a change in the sewer line direction, slope, elevation, pipe size and junctions. The circular, usually cast iron plates seen on roads across the country cover underground confined spaces that serve a fundamental role in the making and success of a sewer system. 
What are the different circumstances under which manhole construction is performed?
Location of the Manhole – The manhole construction is performed under the following circumstances:
Where a change of sewer line is necessaryThere is a change in sewer size and alignment.A junction is formed by two or more sewer lines
What is the base of a manhole made of?
Generally, the base of the manhole is made of plain cement concrete and it is placed at the base level, for supporting the sidewall of the ma hole and also it is preventing the entry of groundwater. The manhole side walls are made of stone masonry, brick masonry, and reinforced cement concrete.
