... 2.High tenacity polyester 3.Polyester Geogrid Strength:30-1000kN/m 4.Width:5-30m,50-400m HockGrid® Mining Geogrid ... Mining Geogrid (Polyester Geogrid) Tensile strength ( warp/weft )kN/m: 30/30,40/40,50/50,60/60,80/80 ... 300/300,400/400,600/400,800/800,1000/1000kN/m Mesh size: 20mm x 20mm,30mm x 30mm,50mm ... USA,Russia Mining Safety Test. Mining Grid 80-80kN/m for Mine Roadways Roof and Wall Safety Support