In a world of round manholes, sometimes it’s hip to be square. By Eric Carleton, P.E. […]
This month we are pleased to feature Concrete Systems Inc. as part of our Meet a Precaster blog series. The […]
This month we are pleased to feature Lee’s Precast as part of our Meet a Precaster blog series. […]
This month we are pleased to feature Shea Concrete products as part of our Meet a Precaster blog […]
This month we are pleased to feature Wieser Concrete Products as part of our Meet a Precaster blog […]
This month we are pleased to feature Western Precast Concrete, Inc. as part of our Meet a Precaster […]
By Kirk Stelsel Water is the most plentiful natural resource on Earth. It sustains all known […]
Problem: A utility manhole is installed in an area with an unexpected high water table. The sump hole through the bottom slab allows a constant 2 ft (0.6 m) of water inside the manhole, preventing installation of equipment. How can the hole be sealed?
Whenever you have something inspected, there’s a natural tendency to want the inspection to occur at the latest stage of the process in order to measure performance in its final position.
Have you ever found yourself on a project where local codes or requirements specify that vacuum testing of manholes must be done after backfill? We’ve received many calls from producers and contractors or installers faced with this same situation. Can’t really blame the owners. Testing after backfilling provides them with a degree of certainty that a watertight system has been installed. There are three major disadvantages when proceeding with this test:
Round manholes are the most widely used maintenance utility structures to provide access to buried pipelines for inspection and cleanout.
Understanding the limits of the methodology