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Now <br /> AM <br /> .. Florida Erosion and Sediment Control Inspector's Manual <br /> aw 5 . Wire fence reinforcement for silt fences using standard strength filter cloth shall be <br /> a minimum of 36 inches (90 cm ) in height, a minimum of 14 gauge and shall have <br /> a maximum mesh spacing of 6 inches ( 15 cm ) . <br /> MW <br /> Sheet Flow Applications : Filter Barrier <br /> This sediment barrier may be constructed using burlap or standard strength synthetic filter <br /> fabric. It is designed for low or moderate flows not exceeding 1 cfs. (0 . 03 m3 / sec . ) . (See <br /> Plate 4 . 06b ) <br /> a. <br /> 1 . The height of a filter barrier shall be a minimum of 15 inches (38 cm) and shall not <br /> exceed 18 inches (45 cm ) . <br /> 2 . Burlap or standard strength synthetic filter fabric shall be purchased in a continuous <br /> roll and cut to the length of the barrier to avoid the use of joints (and thus improve <br /> .w the strength and efficiency of the barrier) . <br /> 3 . The stakes shall be spaced a maximum of 3 feet (90 cm ) apart at the barrier <br /> �. location and driven securely into the ground a minimum of 8 inches (20 cm ) . <br /> 4 . A trench shall be excavated approximately 4 inches ( 10 cm) wide and 4 inches ( 10 <br /> cm ) deep along the line of stakes and upslope from the barrier. <br /> 5 . The filter material shall be stapled to the wooden stakes , and 8 inches (20 cm ) of <br /> the fabric shall be extended into the trench . Heavy duty wire staples at least 1 /2 inch <br /> ( 13 mm ) long , hog rings , or tie wire shall be used . Filter material shall not be stapled to <br /> existing trees . <br /> 6 . The trench shall be backfilled and the soil compacted over the filter material . <br /> '" 7 . Filter barriers shall be removed when they have served their useful purpose , but <br /> not before the upslope area has been permanently stabilized . <br /> 'Sheet Flow Application : Silt Fence <br /> This sediment barrier uses standard strength or extra strength synthetic filter fabrics . It is <br /> `w designed for situations in which only sheet or overland flows are expected . (See Plate 4 .06d ) <br /> WN 1 . The height of a silt fence shall not exceed 36 inches (90 cm) . Higher fences may <br /> impound volumes of water sufficient to cause failure of the structure . <br /> 2 . The filter fabric shall be purchased in a continuous roll cut to the length of the <br /> barrier to avoid the use of joints . When joints are necessary , filter cloth shall be <br /> spliced as described in item No . 8 below . <br /> 4-26 <br /> OW <br />