S ec t i o n 1 0 -P a g e5 May 2013 Polymesh DYWIDAG Polymesh is comprised of high tenacity yar ns, woven into a stable interlocking grid structur e and then coated with PVC for pr otection during installation. Polymesh is used for longwall r ecovery mats as well as rib and r oof contr ol. Longwall r ecovery mats ar e fabricated and assembled to mine- specifcations. • Light weight - r educes cost and handling time. • No sharp edges, r educing injury hazar d associated with chain link and welded wir e. • Conforms easily to the r oof or ribs due to the multiflament yar n design. • Str onger than other polymer grids: Since the longitudinal and transverse members ar e cr ossed and independent, ther e is less ripping out at the intersections than with other polymer grids. • Both FRAS and Non-FRAS available (FRAS - Fir e Resistant and Anti-Static)) Polymesh is available in r olls made to custom length. The typical r oll lengths ar e 30 m, 50 m and 100 m.The width also can be customized to specifc needs but common a re 1.25 m and 2.5 m with 5 m being the maximum width. DSI Grades T ensile str ength (ASTM-D4595) Minimum apertur e size W eight (ASTM-D5261) MD XMD MD XMD ultimate at 2strain 1 ultimate All Polyester lbs/ft kN/m elongation inch mm oz/yd 2 g/m 2 55/55 440 440 55 55 18 231.30 33 12 375 55/55 440 440 55 55 18 232.40 60 12 375 80/80 650 650 80 80 18 231.25 31 15 500 80/80 650 650 80 80 18 232.40 60 15 500 200/80 1,600 650 200 80 18 231.25 31 23 780 200/200 1,600 1,600 200 200 18 231.05 26 38 1288 MD = machine dir ection, XMD = Cross Machine Dir ection 1 2strain is equivalent to 10" convergence given 10ft unsupported span during shield r ecover y . www .dsiundergr ound.com