Precast concrete manholes have become the construction industry’s product of choice over cast-in-place concrete, brick, and other non-concrete products for many reasons, not the least of which is the ease of installation. Precast concrete manholes can be easily installed on demand and immediately backfilled. There is no need to wait for concrete or mortar to cure at the job site. The degree of soil compaction around the manhole and remaining trenches is never a problem, making installation faster and easier. Contractors are familiar with how to handle precast concrete manholes and can easily install them. Standard sealants and flexible joints are readily available and are vital to water tightness.

Life of A Precast Concrete Manhole System:
Precast concrete strengthens with time, while other materials can deteriorate, experience creeps and stress relaxation, lose strength, and/or deflect as they age. The load-carrying capacity of precast concrete is derived from its own structural qualities and does not rely on the strength or quality of the surrounding backfill materials. Studies have shown that precast concrete products can provide a service life in excess of over 100 years. For severe service conditions, additional design options are available that can extend the life of the precast concrete product. This is extremely important when calculating life-cycle costs for a project.

Uses
Precast circular concrete 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
. Impoundment Overflow Structures

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

Applications
Precast circular manholes can be used for the following:
. access to the system for maintenance.
. observation points.
. changes in pipe size.
. changes in a pipe shape.
. changes in direction of the pipe.
. junctions for multiple pipes

Precast circular manholes and vertical structures can be provided with the following features:
. Precast Invert Channels
. Protective Linings
. Flexible Watertight Pipe-To-Manhole Connections
. Custom Openings
. Custom Tops

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