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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..."
<ul><li>Material specifications should conform to Ontario Provincial Standard Specification (OPSS) 1860 for Class II geotextile fabrics.</li>
<li>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.</li>
</ul>
<p>Primary considerations are:
<ol>
<li>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;</li>
<li>Maximum forces that will be exerted on the fabric (i.e., what tensile, tear and puncture strength ratings are required?);</li>
<li>Load bearing ratio of the underlying native soil (i.e., is geotextile needed to prevent downward migration of aggregate into the native soil?);</li>
<li>Texture (i.e., grain size distribution) of the overlying aggregate material; and</li>
<li>Permeability of the native soil</li>
</ol>
</p>
<li>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.</li>
</ul>
<p>Primary considerations are:
<ol>
<li>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;</li>
<li>Maximum forces that will be exerted on the fabric (i.e., what tensile, tear and puncture strength ratings are required?);</li>
<li>Load bearing ratio of the underlying native soil (i.e., is geotextile needed to prevent downward migration of aggregate into the native soil?);</li>
<li>Texture (i.e., grain size distribution) of the overlying aggregate material; and</li>
<li>Permeability of the native soil</li>
</ol>
</p>