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~~ <br />87 <br />88 <br />89 <br />90 <br />91 <br />92 <br />93 <br />94 <br />95 <br />96 <br />97 <br />98 <br />99 <br />100 <br />101 <br />102 <br />103 <br />104 <br />105 <br />106 <br />107 <br />108 <br />109 <br />110 <br />111 <br />112 <br />113 <br />114 <br />115 <br />l16 <br />117 <br />118 <br />119 <br />120 <br />121 <br />122 <br />123 <br />124 <br />Alternatively, the defective section may be replaced. <br />Either sewn seams or overlaps (unsewn seams) shall be used in construction. The widths of the <br />overlaps shall. conform to Table 420-1. Sewn seams shalt be in accordance with the <br />manufacturer's recommendations. <br />The first lift of cover material shall be end-dumped or spread over the geotextile from the edges <br />of the geotextile. The height of the dumped pile shall be limited to avoid local bearing capacity <br />failures. The first lifr of cover material shall be graded to a 12 inch thickness or to top of grade <br />whichever is less and compacted. Equipment shall not be on the treated area with less than the <br />minimum thickness of compacted cover material over the geotextile. Small dozer equipment or <br />front end loader shall be used to spread the cover material. <br />Construction vehicles shall be limited in size and weight such that rutting in the initial lift is no <br />deeper than 3 inches. If rut depths exceed 3 inches, the Contractor shall use a smaller size and <br />weight of construction vehicles. Ruts shall be filled in with cover material. <br />Compaction of lifts shall be accomplished without damaging the geotextile. Construction <br />equipment shall not make [urns on the first lift of cover material. <br />Table 420-1 <br />Minimum Required Overlap <br />Sub rode Stren th R-Value Overla Width Unsewn Seam Inches <br />5-10 30 <br />10-20 24 <br />>20 18 <br />420.08 Landscape Weed Barrier. Landscaped and mulched areas to be covered by <br />geotextile shall be brought to finish grade below the depth of the mulch material shown on the <br />plans. Ail soil preparation shall be completed prior to geotextile application. <br />The geotextile shall be rolled directly onto prepazed soil in the direction of water flow. The <br />geotextile shall be applied loosely without stretching. The top edge of the geotextile shall be <br />buried in a 6 inch check slot at the top of the slope and stapled. <br />When specified, metal landscape border shall be placed adjacent to check slot on the uphill side, <br />so as not to puncture the geotextile. <br />Where one roll of geotextile ends and a second roll begins, the upslope ;piece shall be brought <br />over the start of the second roll and overlapped in accordance with the manufacturer's <br />recommendation. Where two or more widths of geotextile aze applied side; by side, they shall be <br />overlapped in accordance with the manufacturer's recommendation. Staplers shall be inserted at a <br />2 foot spacing along the outer edges of the geotextile where a metal border is not used. <br />3-24 <br />G \tO1~D0100.OTA\Repons\KMTerhniral Specifications tlx Febivary 3, ZOOG <br /> <br /> <br /> <br /> <br />L_J <br /> <br /> <br /> <br /> <br /> <br /> <br />r <br /> <br /> <br /> <br /> <br />l.J <br /> <br />