General Features

• The DSI Ultrastrand Bolt is a cable designed to be installed as a long rock bolt which is capable of being post-tensioned at the face, or outbye, to loads of up to 25 tonnes using the DSI Tensioner Unit.
• The Ultrastrand Bolt is manufactured from 21 wire strand with a 12mm square for mixing chemical anchors, welded to one end of the strand.
• The Ultrastrand Bolt is designed for high pre-tensioning using a point anchor system. Full encapsulation up to 8.0m is obtainable depending on installation equipment available.
• Strand Properties: The Ultrastrand Bolt is made from 19 wire high tensile strand for flexibility.
• Strand Construction 9,9,1. Wire diameters 5.38, 3.05, 6.10mm
  Enhanced load transfer. The bolt can achieve greater load transfer compared to other tendon support by bulbing. This can be tailored to suit individual requirements.
• If full encapsulation is required, extra slow speed chemical anchors of 20 minutes set time are available. Refer to Section F for chemical anchor details. The Ultrastrand Bolt can also be effectively used with cementitious grouts. The Ultrastrand Bolt concept allows a longer than seam height bolt to be installed at up to 300 from the vertical at the face, or outbye, to supplement existing strata reinforcement. Compatible domed plates are available to be used with the Ultrastrand Bolt.
• The Ultrastrand Bolt system is patent pending.

Installation Guidelines

• After insertion of the chemical anchors, the bolt is rotated through the anchors while pushing the bolt fully 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.
• The tensioner unit is connected to the Ultrastrand Bolt and tension applied.
• For further details, refer to DSI Tensioner Unit user instruction guide.

Standard Lengths & Packaging

• Standard Ultrastrand Bolts lengths range from 4100 to 8100mm.
• Collar/wedge assemblies are supplied separately to the bolt.
• Non-standard requirements are available by negotiation.
• 4100 to 8100mm long Ultrastrand Bolts are strapped in bundles of 50 and supplied on steel trays.
• Assistance should be sought from DSI Technical Service Engineers in selection of the correct Ultrastrand Bolt fittings for the application and correct product codes.

Notes

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