MORE INFORMATION
Concrete manholes, or maintenance holes, are available in two basic shapes: circular and rectangular. Rectangular structures are discussed in our Utility Chamber and Monobox MH pages. Circular manholes are available in nominal inside diameters of 1200mm, 1500mm, 1800mm, 2400mm, 3000mm, and 3600mm. The standard depth of bury for precast manholes are 10m to the base, but designs for deeper applications or different live load conditions are available. The standard riser section heights are available in 300mm increments. Each circular MH section is supplied with a single offset joint and a pre-lubricated rubber gasket.
BENEFITS
- Not as dependent on the pipe-soil interaction for its structural strength, therefore is not as installation sensitive as other MH materials
- Available in countless configurations, such as prebenched, precast drop structures, and flexible pipe-to-MH connectors
APPLICATIONS
Access points and pipe junctions in storm and sanitary gravity sewer systems
Valve chambers for watermain and forcemains
Storm sewer catchbasins and ditch inlets
Lift station wet wells
Stormwater management structures
Sump pits, or underground storage tanks
