S31 BD Specification Sheet

Rev 0911 PHONE: (866) 280-7327 ? www.erosioncontrolblanket.com ? FAX: (204) 378-2140 S31 BD Specification Sheet The ErosionControlBlanket S31 BD is a short-term 100% biodegradable straw fiber erosion control blanket designed for use on mild slope and channel applications requiring erosion control for up to 12 months depending on moisture, light, and environmental conditions. The blanket is sewn together on 1.5 inch (38.1 mm) centers. The S31 BD meets all requirements established in the FHWA FP-03 as a Type 2C erosion control blanket for use on slopes with gradients not exceeding 3:1 (h:v) and has been tested by the National Transportation Product Evaluation Program (NTPEP). The S31 BD comes packaged in clear shrink-wrap with an orange band and includes installation instructions. Product Nomenclature & Properties S = 100% agricultural straw fiber matrix 3 = straw fiber matrix applied at a rate of 0.5 lbs/yd2 (270 g/m2) 1 = a single biodegradable leno woven top net with a mesh size of 0.5 x 1.0 in (1.3 x 2.54 cm) BD = 100% biodegradable leno woven net, thread, and matrix to ensure consistent functional longevity Index & Bench Scale Testing Test Description Test Method Test Results Mass per Unit Area ASTM D6475 6.21 oz/yd2 Tensile Strength ASTM D6818 10.9 lbs/in @ 11.3% MD 6.6 lbs/in @ 13.1% TD Thickness ASTM D6525 0.329 in Light Penetration / Ground Cover ASTM D6567 15.7% / 84.3% Water Absorption ASTM D 1117 & ECTCTASC 00197 417% Unvegetated Bench-Scale Rain Splash and Runoff (not to be used as a design value) ASTM D7101 Soil Loss Ratio* = 8.88 Soil Loss Ratio* = 9.02 Soil Loss Ratio* = 9.16 Unvegetated Bench-Scale Shear Stress (not to be used as a design value) ASTM D7207 1.30 lbs/ft2 @ ½ in. soil loss Seed Germination and Plant Growth Under Bench-Scale Conditions ASTM D7322 436% Improvement (increased biomass) *Soil Loss Ratio = Soil Loss Bare Soil / Soil Loss with RECP = 1 / C-Factor (Note: Soil loss is based on regression analysis) Design Values ? “C” factor = 0.03 ? Maximum Permissible Shear Stress = 1.5 lbs/ft2 (72 Pa) ? Maximum Permissible Velocity = 5 ft./sec. (1.52 m/s) ? Manning’s “n” = 0.027 Standard Roll Details Width 2.44m (8 ft) 4.88m (16 ft) Standard Length 34.3m (112.5 ft) 34.3m (112.5 ft) Area 83.61m2 (100 yd2) 167.22m2 (200 yd2) Weight ± 10% 27.2 kg (60 lb) 54.4 kg (120 lb) “Big Daddy” Roll Details Width 2.44m (8 ft) 4.88m (16 ft) Standard Length 120m (393.75ft) 120m (393.75 ft) Area 292.65m2 (350yd2) 585.3m2 (700 yd2) Weight ± 10% 95.26kg (210 lb) 190.51kg (420 lb)