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Revision as of 00:48, 30 June 2017 by Jenny Hill (Created page with "<ul><li>Material specifications should conform to Ontario Provincial Standard Specification (OPSS) 1860 for Class II geotextile fabrics.</li> <li>Fabrics should be woven monof...")
- Material specifications should conform to Ontario Provincial Standard Specification (OPSS) 1860 for Class II geotextile fabrics.
- Fabrics should be woven monofilament or non-woven needle punched. Woven slit film and non-woven heat bonded fabrics should not be used as they are prone to clogging.
Primary considerations are:
- Suitable apparent opening size (AOS) for non-woven fabrics, or percent open area (POA) for woven fabrics, to maintain water flow even with sediment and microbial film build-up;
- Maximum forces that will be exerted on the fabric (i.e., what tensile, tear and puncture strength ratings are required?);
- Load bearing ratio of the underlying native soil (i.e., is geotextile needed to prevent downward migration of aggregate into the native soil?);
- Texture (i.e., grain size distribution) of the overlying aggregate material; and
- Permeability of the native soil