We Cut Round Holes!
We adjust manholes and utility access points to grade using a patent pending process that uses a circular cut and engineered casting placement that eliminates bumps in the road and cracking of the concrete / asphalt patch around the manhole.
The circular cut allows for the stress and loads placed on the patch to be distributed evenly. It is this even distribution and a solid monolithic pour of concrete that prevents the cracks and other problems associated with traditional methods. We adjust the ring and cover to within 1/16 of an inch of specified height. This precision placement of the ring and cover is only possible as a result of the patent pending technology, and the benefits of the circular cut produces the best road surface possible. In addition to this we typically us a volumetric concrete truck to allow us to pour our own mix of concrete to the customer's specifications on demand with out delays associated with delivered concrete or the inconsistency of hand mixing.
We only use solid reinforced concrete that is poured on site unless otherwise specified by the owner. The casting is integrated in the solid pour so it can not move. Inside the manhole, a smooth and integrated surface is formed that allows for easy liner installation or coating application to prevent ground water infiltration. We avoid using rubber or plastic riser rings as they can compress over time. Rubber riser rings also can rebound from loads producing a jackhammer like effect that destroys the concrete. Concrete risers are also avoided as they are hard to work with and are rarely able to provide just the right amount of height adjustment needed.
Our system can help paving contractors perform their job faster and lower costs relative to traditional methods. We accomplish this by first lowering the manholes out of the way of the paving contractor. Then we come back after the paving is completed and use GPS to locate the manholes and rase them to grade. The finished product is also better in every way to other methods of adjustment. The manhole casting is within a 16th of an inch of the surface of the roadway elevation, making an almost seamless transition from road to manhole.
We also can perform adjustments using other standardized methods on and off road.