Friction Bolt -33-600mm

  • -Friction bolt -33-600mm reference to the AS/NZS1594 / ASTM A1011 standard.
  • -Thermal diffusion galvanizing is available for the Friction Bolt.
  • -The friction bolt undergoes very stringent tensile testing to ensure product quality.
  • -Provide customers with a pull test for friction bolts after installation.
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Product Details

Friction Bolt -33-600mm Functions

Friction Bolt -33-600mm is a frictional ground support system. When a friction bolt is inserted into drilling hole with a smaller diameter, the slot partially closes and bolt diameter is compressed, which creates radial forces  on rock roof surface along the whole length and firmly holds the rock.

                    Friction Bolt -33-600mm

Friction Bolt -33-600mm Features&Advantages

Made from high strength steel band  

Immediate frictional Support in axial and radial

Independent supporting without plate

Easy for installation

Simple design,cost saving

Available in black,cold galvanizing or hot dip galvanized


Friction Bolt -33-600mm Mechanical Properties


Technical DataTRFB33TRFB39TRFB42TRFB47
Drill hole diameter (mm)30-3235-3838-4043-45.5
Min.Yield strength (kN)8090100120135
Min.Tensile strength (kN)100120132165180
Typ.Tensile strength (kN)120130150180200
Elongation (A%)≥20≥20≥20≥20
Typ.Anchorage (ton/m)4-64-75-86-10
Bearing plate (mm)150x150x4150x150x4150x150x4.5150x150x5

Friction Bolt -33-600mm Accessories

      Bearing plate,Driver,Pull collar.


Friction Bolt -33-600mm Length & Package

Length:450-3000mm as specified

Package:100pcs — 300pcs each bundle as specified 


     Friction Bolt -33-600mm  Friction Bolt -33-600mm

Friction Bolt -33-600mm Applications

Mines

Tunnels

Slopes

Places where need ground support


How to work

        Assess the ground conditions thoroughly before installation.

        

        Select the appropriate drill bit and bore a hole to suit the diameter and length of the friction bolt, ensuring the hole is at least 150mm longer than the bolt.

        

        Affix a plate to the friction bolt, positioning the dome against the ring and the tapered end forward.

        

        Install friction bolts perpendicular to the rock surface for optimal effectiveness.

        

        Insert the driver dolly into the bolt and drive it into the hole until the plate presses firmly against the rock.

        

        Avoid hammering the friction bolt once the plate is securely attached to the rock to prevent damage to the bolt's end.

        

        Conduct pull tests to verify the initial anchorage strength of the friction bolts post-installation.

        


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