Prestressed Yielding Arch Support

Steel Arch and Tunnel Support Systems

  • Tunnel junctions
  • Over and under ore passes
  • Haulages
  • Incline shafts portals
  • Active support through bad ground conditions, dykes, faults, friable ground
  • Simple and fast installation
  • Very high carrying capacity
  • Long operational life
  • Suitable for tunnels from 4.15m to 5.5m wide
  • Active support by the arch set
  • Keystone available to suit tunnels from 4.15 to 5.5 meters
  • Upright support beams cater for tunnel heights from 3.1 to 6.5 meters
  • Cost effective
  • Dimensional and design flexibility
  • Suitable for various excavation heights
  • Cribbing or Void fill can provide active support by energising the props

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