Circular Manhole System

Company brochure

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 hamber 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.

Benefit of Precast Concrete Manholes over HDPE and Fibre Glass

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 500 ft deep (underground).

Manhole bases available in 1000 mm, 1200 mm, 1500 mm, 1800 mm & 2400 mm diameter