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MATERIAL SPECIFICATION <br />A ~~ SC250 <br />GREEN' <br /> <br />The composite turf reinforcement mat (C-TRM) shall be amachine-produced mat of 70% straw/30% coconut fiber matrix <br />incorporated into a permanent three-dimensional turf reinforcement matting. <br />The matrix shall be evenly distributed across the entire width of the matting and stitch bonded between a heavy duty UV <br />stabilized bottom net with 0.50 x 0.50 inch (1.27 x 1.27 cm) openings, an ultra heavy duty UV stabilized, dramatically <br />corrugated (crimped) intermediate netting with 0.50 x 0.50 inch (1.27 x 1.27 cm) gpenings, and covered by a heavy duty <br />UV stabilized top net with 0.50 x 0.50 inch (1.27 x 1.27 cm) openings. The middle corrugated netting shall form <br />prominent closely spaced ridges across the entire width of the mat. The three nettings shall be stitched together on 1.50 <br />inch (3.81 cm) centers with UV stabilized polypropylene thread to form a permanent three-dimensional turf reinforcement <br />matting. <br />The SC250 shall meet requirements established by the Erosion Control Technology Council (ECTC) Specification and the <br />U.S. Department of Transportation, Federal Highway Administration's (FHWA) Standard Specifrcations For <br />Construction of Roads and Bridges on Federal Highway Projects, FP-03 2003 Saction 713.18 as a Type SA, B, and C <br />Permanent Turf Reinforcement Mat. <br />Installation staple patterns shall be cleazly mazked on the turf reinforcement mattinl;s with environmentally safe paint. All <br />mats shall be manufactured with a colored thread stitched along both outer edges 1"approximately 2-5 inches [5-12.5 cm] <br />from the edge) as an overlap guide for adjacent mats. <br />The composite turf reinforcement mat shall be the North American Green SC250, or equivalent. The SC250 permanen~ <br />composite turf reinforcement mat shall have the following physical properties: <br />Material Content <br />Matrix 70% Straw Fiber <br />(0.35 Ib/yd2) (0.19 kg/m2) <br />30% Coconut Fiber <br />(0.15 lb/yd2) (0.08 kg/m2) <br />Netting Top and Bottom -Heavy Duty UV Stabilized Polypropylene <br />(5.0 Ibs/1,000 ft2 [2.44 kg/100 m2] approximate weight) <br />Mid -Corrugated Ultra Heavy Duty UV Stabilized Polypropylene <br />(24 Ib/1,000 ft2 [11.7 kg/100 m2] approximate weight) <br />Thread UV Stabilized Polypropylene <br />SC250 is Available with the Following Physical Specifications Per Roll [English Units (Metric Units)] <br />Width 6.50 ft (2.00 m) <br />Length 55.50 ft (16.90 m) <br />Weight t 10% 34.00 Ibs (15.42 kg) <br />Area 40.00 yd2 (33.40 m2) <br />Stitch Spacing for All Rolls = I.50 inches (3.81 cm) <br /> <br />Updated 1/2004 <br />