HDPE Coated Woven Mesh Rockfall Protection Netting Technical Specifications

HDPE COATED WOVEN MESH ROCK NETTING Rock Netting shall comply with the following specifications MANUFACTURE Rock netting supplied in rolls shall be hexagonal double twist woven wire mesh. (sometimes also referred to as triple twist) MESH SIZE Mesh openings shall be of nominal dimension of 80mm (mesh type referred to as 80 x 100mm or 8x10 or type 8). CORROSION Wire shall be zinc coated to BSEN 10244-1:2001 and additionally coated PROTECTION with an Extruded UV stabilised Grey HDPE coating of nominal radial thickness of 0.5mm HDPE coating :- Borstar HE6063 density 0.942 Bimodal high density jacketing for communication and power cables, UV Stabilised, colourable MESH WIRE 2.70mm wire diameter core to BS 1052 JOINTING Lacing wire 2.2mm wire diameter core of the same corrosion protection as the mesh fabric for assembly of the units. Stainless steel ‘C’ rings fixed with a pneumatic closing tool (1 clip every other mesh opening) can be used as an alternative to continuous lacing HY-TEN GABION SOLUTIONS Dunstall Hill Trading Estate, Gorsebrook Road, Wolverhampton, WV6 0PJ Tel 01902 712200 Fax 01902 714096 e-mail sales@hy-tengabions.com web www.hy-tengabions.com Notes on Extruded HDPE v Extruded PVC Coatings Properties of Polymer Coatings PROPERTY EXTRUDED HDPE COATING EXTRUDED PVC COATING Oxidation resistance excellent excellent Heat resistance excellent good to excellent Oil resistance good to excellent fair Low temperature resistance Excellent ( -135 deg C) poor to good (-40 deg C) UV resistance excellent good to excellent Ozone resistance excellent excellent Abrasion resistance excellent fair to good Elongation 700% 280% Tensile Strength Min 30kPa Min 16kPa Resistance to chemicals PROPERTY EXTRUDED HDPE COATING EXTRUDED PVC COATING Water excellent fair to good Acid excellent good to excellent Alkali excellent good to excellent Fuel good to excellent poor The properties and chemical resistance of the Extruded HDPE coating is superior compared to the traditional Extruded PVC coating. The application of the HDPE coating for gabions represents a significant step forwarded in ensuring the durability and performance of the corrosion protection afforded. A common problem with Extruded PVC coatings on woven wire mesh is that during manufacture (when the wires are twisted together) work hardening of the PVC coating takes place combined with the inferior of elongation properties of the PVC coating splitting of the PVC coating occurs reducing the long term durability of the product. With the Extruded HDPE this problem is considerably reduced due to the greater elongation properties of the polymer coating splitting of the Extruded HDPE HY-TEN GABION SOLUTIONS Dunstall Hill Trading Estate, Gorsebrook Road, Wolverhampton, WV6 0PJ Tel 01902 712200 Fax 01902 714096 e-mail sales@hy-tengabions.com web www.hy-tengabions.com