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John Houle: Senior Technical Consultant, PVC Pipe Industry
John Houle holds a Master’s Degree in Civil Engineering from the University of Missouri and an MBA from the University of Oregon. He has more than 25 years of experience in the plastic pipe industry in applications engineering, market development, forensic analysis, technical writing, and standards development.
In trenchless installations, pipes are typically pushed or pulled into position. This pushing or pulling causes loads on the pipes that are not encountered during open-cut construction. As a result, the PVC pipe industry has developed four types of restrained-joint systems for trenchless projects.
The four joining systems are:
1. Internally restrained gasketed joints
2. Ring-and-pin gasketed joints
3. Spline-lock gasketed joints
4. Butt-fused PVC joints
For my Tech Brief on these PVC pipe joints, click here.
These restraint systems are not limited to trenchless installations. They are often used in open-cut situations where restraint is required.
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