S e c t i on 8 - P a ge2 May 2013 • After insertion of the chemical anchors, the bolt is r otated thr ough the anchor(s) while being pushed to the back of the hole. • It is important to follow the chemical manufactur er’ s r ecommended mixing and hold times as printed on the chemical anchor cartons. DO NOT OVER MIX. • For further details r egar ding installation pr ocedur es r efer to DSI’ s “Practical Guide to Rock Bolting”. Standar d Lengths Packaging • Standar d bolt lengths range fr om 1200 to 1800mm in 300mm incr ements. • Other lengths a re available by negotiation. • 1200mm long dowels a re packed in 10’ s then palletized in lots of 1000. • 1500 and 1800mm long dowels a re packed in 10’ s then palletized in lots of 500. Fibr eglass Dowel Fully Formed Thr eaded Ribbed FRP Dowels General Featur es • The dowels a re pull formed (matched die) fbr eglass construction and a re ribbed over its full length to pr ovide maximum load transfer . • Thr ead form is of a sinusoidal type, nominally 150mm long and 25mm diameter , and is ftted with an integral drive nut with radial face. • All fbr eglass dowels a re designed to be used with chemical anchors and be fully encapsulated. • Bolts over 2400mm in length a re available in all dowel types by negotiation. • Australian Patent Numbers 631881 and 65494 ar e applicable to these bolts. Installation Guidelines • 26-27mm hole diameters a re pr eferr ed. Holes over 28mm diameter ar e not r ecommended. • Hole depth is critical. Hole depth should be shorter than the bolt to allow for the height of the washer and nut. Notes: - HD - High Density V ersion - 20 and 22mm bolt diameters available Physical Pr operties 12.5 T onne Dowel 15 T onne Dowel 20 T onne Dowel 30 T onne Dowel 38 T onne Dowel Ultimate T ensile Str ength 125 kN 150 kN 200 kN 300 kN 380 kN Nut/Thr ead T ensile Str ength 55 kN 85 kN 85 kN 95 kN 95 kN Single Shear Str ength 45 kN 50 kN 57 kN 65 kN 74 kN Nut Br eakout T or que 30 ft/lbs 35 ft/lbs 40 ft/lbs 40 ft/lbs 40 ft/lbs Mass per Meter (Std-HD) 650-800 gms 675-850 gms 720-875 gms 750 gms 775 gms Nominal Bolt Diameter 20 mm 20 mm 20 mm 20 mm 22 mm Nominal Cr oss Sectional Ar ea of Bolt 310 mm 2 310 mm 2 310 mm 2 310 mm 2 325 mm 2 Thr ead Length 150 mm 200 mm 200 mm 200 mm 200 mm Major Bar Diameter (thr ead) 25.4 mm 25.4 mm 25.4 mm 25.4 mm 25.4 mm Specic Gravity (grams/cm 3 ) 1.7-2.0 1.8-2.1 1.9-2.15 1.95-2.2 2.0-2.25 www .dsiundergr ound.com