General Features

• The DSI HI-TEN Strand Bolt is a cable designed to be installed as a long rock bolt which is capable of being post-tensioned at the face, or out-bye, to loads of up to 27 tonnes using DSI Tensioner Unit.
• The HI-TEN Strand Bolt is manufactured from 21 wire strand having a 12mm square, for mixing chemical anchors, welded to one end of the strand.
• The HI-TEN Strand Bolt has a special collar and segmented wedge, which can sustain collar loads of between 57 and 60 tons.
• The HI-TEN Strand Bolt is designed for high pre-tensioning using a point anchor system.
• If full encapsulation is required, extra slow speed chemical anchors of 20 minutes set time are available.
• The HI-TEN Strand Bolt can also be effectively used with cementitious grouts.
• The HI-TEN Strand Bolt concept allows a longer than seam height bolt to be installed at up to 30° from the vertical at the face,
• or out-bye, to supplement existing strata reinforcement.
  Compatible domed plates are available to be used with the HI-TEN Strand Bolt.
• The HI-TEN Strand Bolt system is patent pending.

Installation Guidelines

• 28mm hole diameters are preferred.
• Hole depth is critical. Hole depth should be approximately 155mm shorter than the bolt length.
• This allows for sufficient tail to fit accessories, roof plate, collar/wedges & Tensioner Unit.
• 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 manufacturers recommended mixing and hold times as printed on the chemical anchor cartons. DO NOT OVER MIX.
• The tensioner unit is connected to the HI-TEN Strand Bolt and tension applied.
• For further details refer to DSI’s Tensioner Unit user instruction guide.

Standard Lengths & Packaging

• Standard HI-TEN Strand Bolts lengths range from 4100 to 8100mm.
• Collar/wedge assemblies are supplied separately to the bolt.
• Non-standard requirements are available by negotiation.