Page 1 - Section3.2-FiltrexxLockDownNetting

increase the slope stabilization and erosion control capabilities of Temporary seeding, Slope protection, and Storm water blankets.

LockDown tm Netting is typically stapled to the slope prior to application of these practices; however, where high wind velocity conditions are anticipated, LockDown tm Netting should be installed on top of these practices. LockDown tm

Netting is available in three different materials, including biodegradable cotton, HDPE, and polypropylene. LockDown tm Netting is recommended for slopes between 3:1 and 2:1, and is required for slopes greater than 2:1. Slope protection should not be applied at slopes greater than 1:1 without additional support from erosion control armoring devices or practices. For LockNetting tm Material Specifcations see Table 1.2. See Figure 1.2 for examples of LockDown Netting tm installations. See Figure 1.2 for design details of LockDown tm Netting installed under Filtrexx ® Slope protection and Figure 1.3 for design details of LockDown tm Netting installed on top of a Filtrexx ® Slope protection.

LockDown tm Netting is categorized as an erosion control net (ECN) (ECTC, 2004) and is used to increase soil surface roughness and stability of disturbed soils on hill slopes. The primary purpose of LockDown tm Netting is to provide a structural surface to increase the stability of the Temporary seeding, Slope protection, or Storm water blanket at the soil interface, particularly on steep grades.

LockDown tm Netting is not suffcient to be used alone as a form of slope stabilization or erosion control, and is to be used as a permanent stabilization practice. LockDown tm Netting is available in a variety of materials of differing tensile strength, functional longevity (2 mo.- 4 yrs), and degradability. Cotton LockDown tm Netting is 100% biodegradable. LockDown tm Netting is typically applied to bare hill slopes prior to application of Slope protection. During installation, LockDown tm Netting is installed horizontally down slope and anchored to the soil using 6-8 in (150-200mm) sod staples to be driven along the entire perimeter of the net with approximately one sod staple per square yard (0.8 square m) within the net perimeter. See Installation specifcations for more details.