Construction specifications to consider when selecting manholes and manhole covers include materials of construction, shape, and application. Common materials of construction include precast concrete, ...

Precast Concrete Precast manholes are usually made of concrete produced in sections at a factory and assembled at the site. Fiberglass Fiberglass is used with plastics to create an environmentally ...

Can be installed in under a minute and have saved our customers millions of dollars, thousands of work and crew hours and solved noise complaints from rattling manhole lids Turner manhole rings ...