The DSI Underground 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 25 tonne using the DSI Underground 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 52 and 55 tonne.
The HI-TEN Strand 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.
If full encapsulation is required, extra slow speed resin 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.