The Fabricated Geomembrane Institute (FGI) has produced a new guideline titled “Subgrade requirements for fabricated geomembranes.”
The document details proper preparation of the subgrade for installation of fabricated geomembranes. It is written so that the guidelines can be used up by an engineer or specifier and put into a specification for subgrade requirements. Pictures of acceptable and unacceptable subgrade preparations are provided, giving a visual depiction of what is described in the text.
The subgrade requirements for preventing water pressure buildup below a liner are also addressed in this guideline.
This document is at: www.fabricatedgeomembrane.com
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