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<br />e <br /> <br />. <br />~ <br /> <br />e <br /> <br />. <br /> <br />-e <br /> <br />3/8-inch Fiber Glass Mat <br /> <br />This lining is a fine, loosely woven glass fiber mat similar to <br />furnace air filter material. It has a weight of 0.11 pound <br />per square yard. This material is not to be confused with more <br />dense fiber glass mats used to eliminate plant growth. <br /> <br />Steel pins or staples are placed at the rate of 5 staples per <br />6 linear feet of mat, with two staples along each side and one <br />in the middle. At the start of each roll 4 or 5 staples are <br />spaced approximately one foot apart. Where more than one mat <br />is required, the mats are butt-joined and securely stapled. <br /> <br />l/2-inch Fiber Glass Mat <br /> <br />This lining is a fine, loosely woven glass fiber mat, similar <br />to but denser than the 3/8-inch fiber glass mat, as it weighs <br />0.35 pound per square yard. The stapling procedure is the <br />same as for the 3/8-inch fiber glass mat. <br /> <br />Erosionet 315 <br /> <br />Erosionet is a paper yarn approximately 0.05 inch in diameter, <br />woven into a net with openings approximately 7/8-inch by <br />l/2-inch. The material has li.ttle erosion prevention capability <br />in itself, and is generally used to hold other lining material <br />in place. <br /> <br />Erosionet weighs about 0.20 pound per square yard, and is <br />pinned in the same manner as jute mesh, shown in Figure 4. <br /> <br />23 <br />