S e c t i o n 1 0 - P a g e 6 May 2013 Polymer Mining Grid DSI Polymer Mining Grid is an alter native to weld wir e mesh pr oducts and can be used as a supplemental support structur e between r oof/rib bolts in any under gr ound mining and or tunneling operation. It is corr osion r esistant and is especially applicable to any scr eening pr oject when it will need to be "mined thr ough" such as for pillar wrapping or for pilot tunnels. It is also especially useful in corr osive envir onments. Notes: a) 95lower conf dence limit values, IS) 2602 b) T ypical values c) T ests performed using extensometers d) MD: machine dir ection (longitude to the r oll) TD: transversal dir ection (acr oss r oll width) Dimensions T echnical Data Physical Pr operties Physical Characteristics T est Methods Data Structur e Bi-Oriented Geogrids Mesh T ype Rectangular Apertur es Standar d Color White Polymer T ype Polypr opylene Carbon Black Content ASTM D4218 No Flame Retar dant ISO 9705 Ye s Packaging ISO 10320 Rolls in Polyethylene bags with I.D. labels. Dimensional Characteristics T est Method Unit FR 270 Notes Apertur e MD mm 59.5 b,d Apertur e TD mm 56.5 b,d Mass Per Unit Ar ea ISO 9864 g/m 270 b Roll Width m 4.0 b Roll Length m 25.0 b Roll Diameter m 0.3 b Roll V olume m 0.4 b Gr oss Roll W eight kg 61.0 b T echnical Characteristics T est Method Unit FR 270 Notes MD TD Peak T ensile Str ength ISO 10319 kN/m 20.0 20.0 a,c,d Y ield Point Elongation ISO 10319 13.0 10.0 b,c,d www .dsiundergr ound.com