General Features

• This bolt is hot rolled with deformations that form a coarse left hand thread (10mm pitch) over its entire length.
• The thread bar form provides good load transfer properties.
• The continuous thread provides a high flexibility in "fragile" ground and blasting conditions as the bolt can be readily re-tensioned.
• The thread bar bolt is normally used with chemical anchors (refer to Section F), but can be effectively used with cementitious grouts.
• Corrosion protection may be provided by hot dip galvanizing (refer to Section G). Alternative coatings are available by negotiation.

Installation Guidelines

• 26-27mm hole diameters are preferred. If larger diameter holes are to be used, refer to "Posimix" bolts on page A1.10.
• 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 anchors 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’s "Practical Guide to Rock Bolting".

Standard Lengths & Packaging

• Standard bolt lengths range from 600 to 3000mm in 300mm increments.
• Non-standard requirements are available by negotiation.
• Bolts are packaged in bundles.
• Bolt fittings, such as nuts, anti-friction washers and dome balls, are normally supplied separate with thread bar bolts.

Notes

• Only DSI rock bolt components should be used in order to obtain full performance of the bolt system.
• DSI's Mining Products Division is Quality Assured to ISO 9001:2000, Registration No.QAC/R61/0315.