Precast Concrete Manholes

Precast Manholes are used in sanitary sewer and storm drain systems for access, observation and junctions.

They are a good choice for:

Pump stations

Wet Wells

Stormwater Management Structures

All manholes and vertical structures can be provided for highway, railroad or aviation loading.

Precast Manholes Applications

Precast Manholes can be used for the following:

Access to the system for maintenance

Observation points

Changes in pipe size

Changes in pipe shape

Changes in direction of pipe

Junctions for multiple pipes

Precast circular vertical structures can be used for the following:

Stormwater management or best-management-practice structures

Overflow structures for ponds

Precast circular manholes and vertical structures can be provided with the following features:

Precast invert channels

Protective linings

Custom openings

Flexible watertight pipe-to-manhole connections

Custom tops

Precast Circular Manholes and vertical structures are normally available in diameters of 48 inches through 144 inches.

The following joints are normally available for precast circular manholes and vertical structures:

Single offset with profile rubber gasket

Confined o-ring rubber gasket

Preformed mastic or butyl gasket

The following specifications apply to precast circular manholes:

ASTM C478 / AASHTO M199 — Precast Reinforced Concrete Manhole Sections

ASTM C443 — Joints for Circular Concrete Sewer and Culvert Pipe Using Rubber Gaskets

AASHTO M198 — Joints for Circular Concrete Sewer and Culvert Pipe Using Flexible Watertight Gaskets

ASTM C923 — Resilient Connectors Between Reinforced Concrete Manhole Structures and Pipes

ASTM C1244 — Standard Test Method for Concrete Sewer Manholes by the Negative Air Pressure (Vacuum) Test

PRODUCT BROCHURES

Precast Manholes

RELATED CASE STUDIES

The Canyon Offsite Sewer Project

TECHNICAL RESOURCES

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