Dear Tech Abby:  Do I have to use a crushed stone backfill for my PVC sewer pipe installation?  --That 70’s EngineerDear That 70’s Engineer:  Good question… the answer is “maybe”…Well, let me expand on that.  First, when talking about PVC sewer pipe, remember that PVC products are commonly used in both gravity flow sanitary and storm sewer

Resistivity has to be one of my top ten favorite words used in the engineering community, and today I would like to dive a little deeper into how important this factor is in the longevity and durability of a pipe’s life cycle – hence the reciprocity or  “give back” of resistivity.I was thinking about the questions I often have to field with regard

The focus on environmental issues and “green construction” techniques is readily apparent in today’s construction marketplace. The U.S. Green Building Council and their Leadership in Energy and Environmental Design (LEED) Green Building Rating System for New Construction program places the emphasis on use of environmentally friendly construction

When we set out to write a specification for a flexible pipe system it is important to remember that flexible pipes are composites of both the pipe and the compacted backfill around the pipe. Most specifiers do a very good job of specifying the pipe itself. They use AASHTO, ASTM, DOT, County, or Municipal specification sections or numbers to call