Friction Bolt -42-2400mm

  • -Friction Bolt -42-2400mm(Split sets) is roll-formed into a C-shaped bolt with a slot by a high tensile steel band, which one end is tapered for easily inserting the bolt into drilling hole. The other end is welded a ring to hold the bearing plate.
  • -Friction Bolt -42-2400mm reference to the AS/NZS1594 / ASTM A1011 standard.
  • -Usually combined with domed plates, provides anchoring force for rock strata.
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Product Details

Friction Bolt -42-2400mm Functions

Friction Bolt -42-2400mm is a frictional ground support system.When friction bolt is inserted into drilling hole with 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 -42-2400mm

Friction Bolt -42-2400mm 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 -42-2400mm 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)120
130150180200
Elongation (A%)≥20≥20≥20≥20
Typ.Anchorage (ton/m)4-64-75-86-10
Bearing plate (mm)150x150x4150x150x4150x150x4.5150x150x5

Friction Bolt -42-2400mm Accessories

      Bearing plate,Driver,Pull collar.


Friction Bolt -42-2400mm Length & Package

Length:450-3000mm as specified

Package:100pcs — 300pcs each bundle as specified 

Friction Bolt -42-2400mm  Friction Bolt -42-2400mm

Friction Bolt -42-2400mm Applications

Mines

Tunnels

Slopes

Places where need ground support


How to work


        Evaluate ground conditions.

        Select the appropriate drill bit based on the bolt's diameter and length and the specified drilling method, then drill a hole.

        Ensure the hole is at least 150mm deeper than the friction bolt's length.

        Attach a plate to the friction bolt, placing the dome against the ring and the tapered end forward.

        Install the friction bolts perpendicular to the rock surface.

        Insert the driver dolly into the bolt and drive the friction bolt into the hole until the plate is securely against the rock surface.

        Once the plate is snug against the rock, avoid striking the friction bolt to prevent damage to the bolt's end.

        After installation, conduct pull tests to verify the initial anchorage strength of the friction bolts.


  Friction Bolt -42-2400mm  Friction Bolt -42-2400mm

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