Precast Concrete
Circular Manhole System
A manhole, also called utility hole, cable chamber, maintenance hole, inspection chamber, access chamber or confined space, is the top opening to an underground utility chamber used to house an access point for making connections or performing maintenance on underground and buried public utility and other services including sewers, telephone, electricity, storm drains and gas. The manhole opening is protected by a manhole cover, designed to prevent accidental or unauthorized access to the manhole
Specific arrangements, various benefits
Easy To Install
Safer Installation
- Reduced work in open excavation.
- Eliminates work in confined spaces.
- Eliminates difficult wet trades work.
- Safer Construction
- Safer Lifting equipment
Flexible Design
- Bespoke base design
- Adaptors not usually required.
- Wide range of inlet and outlet configuration.
- Adjustable to any depth requirement.
Product quality
- Rapid installation in minutes.
- Inlet and outlet connection invert levels pre-set.
- No on-site finishing required.
- No lifting holes to fill.
- No jointing strip required.
- No concrete surround.
- Continuous pipe laying.
- Short notice availability.
- Take off service available.
- Complete watertight solution in one unit.
Higher Quality
- Watertight system – base, rings and slabs.
- Quality controlled factory made.
- High quality benching surface finish.
- Subject to manhole configuration, the benching complies with sewers for adoption.
- Precise connection positions and channel gradients.
Precast Concrete
Benefit of Precast Concrete
Precast concrete manholes sit tight without tie-downs.With a specific gravity of 2.40 and a superior frictional resistance, they resist buoyant forces better than other manhole materials such as fiberglass with a specific gravity of 1.86 and HDPE whose specific gravity is 0.97.These alternative materials require the use of tie downs,ultimately increasing project costs and installation headaches.Thus,precast concrete is the clear winner over other materials for manholes.
As per the certification by American concrete pipe association, precast products are sustainable with strength to work till 500ft deep(underground).
