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Hollow bars

DSI Ductile Hollow Bar

Nominal outer diameter
R28: ⌀28 mm / R32: ⌀32 mm
Standard length
R28: 2.4 m / R32: 2.4 m & 3.0 m
Tensile load bearing capacity
R28: 335 kN / R32: 300 kN

Available in Ø28 mm and Ø32 mm, the DSI Ductile Hollow Bar Bolt combines exceptional deformability with fast self-drilling installation for reliable support in squeezing and fractured ground.

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Product specifications

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Technical specifications

Nominal outer diameter
R28: ⌀28 mm / R32: ⌀32 mm
Nominal inner diameter
R28: ⌀12 mm / R32: ⌀17 mm
Standard length
R28: 2.4 m / R32: 2.4 m & 3.0 m
Tensile load bearing capacity
R28: 335 kN / R32: 300 kN 1)
Shear load bearing capacity2
R28: 280 kN / R32: 290 kN 2)

  • 1) Determined during pull-out tests of bolts installed with Mineral Bolt resin in high strength concrete blocks conducted by an independent institution.

  • 2) Determined during shear tests of bolts installed with Mineral Bolt resin in high strength concrete blocks conducted by an independent institution.

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