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Ground Support Systems

Friction Bolts

Our friction bolts are rollformed into a C shape by high tensile steel band. One end is tapered for easy insertion into a drill hole. The other end has a welded ring to hole the bearing plate.

Features

  • Simple installation procedure; save cost
  • High yield strength and high tensile strength
  • Simple design
  • Immediate frictional support
  • Axial and radial support
  • No pressurizing and resin
  • If plate is broken, support is maintained
  • Available in black or hot dip galvanised
Friction Bolts
Dimensions TRFB33 TRFB39 TRFB42 TRFB47
Taper Diameter (mm) A 27 27 32 32 36 36 40
Taper Length (mm) B 45 45 55 55 60 60 65
Sloth Width (mm) C 10 10 14 14 17 17 20
Wall Thickness (mm) D 2.5 3.0 2.5 3.0 2.5 3.0 3.0
Bolt Size (mm) E 33 33 39 39 42 42 47
Ring Diameter (mm) 6.0 6.5 6.5 7.0 7.0 7.5 7.5
Technical Data TRFB33 TRFB39 TRFB42 TRFB47
Drill Hole Diameter (mm) 28-32 28-32 35-38 35-38 38-41 38-41 42-46
Min Yield Strength (kn) 80 96 90 105 99 116 120
Min Tensile Strength (kn) 107 120 115 140 127 154 165
Typ Tensile Strength (kn) 120 136 130 155 143 170 180
Elongation (%) ≥16 ≥16 ≥16 ≥16 ≥16 ≥16 ≥16
Typ Anchorage (ton) 3-6 3-6 3-6 3-6 5-8 5-8 6-10
Bearing Plate (mm) 150*150*4 150*150*4(5) 150*150*5 150*150*5