General Features

• The 20mm dowels are pull formed (matched die) fibreglass constructions and are ribbed over their full length to provide maximum load transfer.
• Thread form is of a sinusoidal type, nominally 150mm long and 25mm diameter, and is fitted with an integral drive nut with radial face.
• All 20mm fibreglass dowels are designed to be used with chemical anchors and fully encapsulated.
• Only the 20 and 30 tonne capacity fibre glass dowels should be used with cementitious grouts.
• Bolts over 2400mm in length are available in all dowel types by negotiation.
• Australian Patent Numbers 631881 and 65494 are applicable to these bolts.

Installation Guidelines

• 26-27mm hole diameters are preferred. Holes over 28mm diameter are not recommended.
• Hole depth is critical. Hole depth should be shorter than the bolt to allow for the height of the washer and nut.
• After insertion of the chemical anchors, the bolt is rotated through the anchor(s) while being pushed to the back of the hole.
• It is important to follow the chemical manufacturer’s recommended mixing and hold times as printed on the chemical anchor cartons. DO NOT OVER-MIX.
• For further details regarding installation procedures, refer to DSI Arnall's "Practical Guide to Rock Bolting".

Standard Lengths & Packaging

• Standard bolt lengths range from 1200 to 1800mm in 300mm increments.
• Other lengths are available by negotiation.
• 1200mm long dowels are packed in 10’s then palletized in lots of 1000.
• 1500 and 1800mm long dowels are packed in 10’s then palletized in lots of 500.

Notes

• DSI's Mining Products Division is Quality Assured to ISO 9001:2000, Registration No.QAC/R61/0315.