An access chamber (or manhole) is a structure designed to allow access to an underground service, such as a stormwater pipe or a sewer.
In the drainage arena an access chamber might be typically be referred to as a Junction Pit, but the Queensland Urban Drainage Manual refers to both manhole chambers and junction structures.
In the case of sewerage WSAA prefers the use of the term maintenance hole to manhole.
Access Chambers are usually constructed from reinforced concrete, either precast or formed insitu.
Other construction materials that can be used to construct manholes include:
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page revision: 1, last edited: 15 Jun 2010 23:55