Questions From the Field February 16, 2022 Leave a Comment Questions from the Field is a selection of questions NPCA Technical Services engineers received from calls, […]
Questions from the Field September 19, 2019 Leave a Comment Questions from the Field is a selection of questions NPCA Technical Services engineers received from calls, […]
Questions from the Field July 5, 2019 Leave a Comment Questions from the Field is a selection of questions NPCA Technical Services engineers received from calls, […]
Thinking Outside the Circle April 11, 2019 Leave a Comment In a world of round manholes, sometimes it’s hip to be square. By Eric Carleton, P.E. […]
The Danger That Lurks Below August 3, 2018 Leave a Comment In June, city workers conducting regular maintenance in downtown Indianapolis detected an underground sinkhole that, thankfully, […]
Manhole Sizing: A Science and an Art March 20, 2018 Leave a Comment A frequent question NPCA Technical Services engineers receive is, “What manhole diameter is used for a […]
Questions from the Field November 15, 2017 Leave a Comment Questions from the Field is a selection of questions NPCA Technical Services engineers received from calls, […]
Are Exterior Manhole Coatings Necessary? July 26, 2017 3 Comments Modern concrete used in precast manhole structures is strong, dense and durable. However, in aggressive environments, […]
Utility Structures Fire/Explosion Mitigation Steps and Measures June 8, 2017 2 Comments Every day, you pass over cast iron manhole covers in the road without a thought of […]
Precast Lighthouse March 13, 2017 1 Comment Provides stunning Great Lakes view. By Mark Crawford Greg Druzbik always dreamed of owning a grand […]
Precast Rules the Roost February 13, 2017 Leave a Comment As night falls in the Pacific Northwest, thousands of small, dark birds known as Vaux’s swifts […]
The Evolution of Manhole Vacuum Testing November 15, 2016 Leave a Comment ASTM C13.06 working to develop a new standard. By Eric Carleton, P.E. For the past five […]