VW Strain Gaged Rockbolt

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VW Strain Gaged Rockbolt

The Model 4910 Instrumented Rockbolt comprises a vibrating wire strain gauge located inside a short length of standard threaded rockbolt or rebar. This short length is then connected via a coupling to a longer length of the same bolt material. The instrumented rockbolt is installed in the same manner as conventional rockbolts, making sure that the strain gauge remains located within the loaded part of the rockbolt.

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Features

Proven and reliable vibrating-wire technology
Linear to 2,500 με
Requires portable readout with probe
Not affected by bending forces
Use standard coupling to add on end of threaded rod
Internal VW Gage and connector recessed inside rod
Excellent stability for long-term measurements
Waterproof

Applications

Retaining wall tiebacks
Threaded rock anchors

specifications

Standard Range	2500 µε, equivalent to around 27,215 kg in a 25 mm Ø bolt
Resolution	0.5 µε, equivalent to around 5 kg in a 25 mm Ø bolt
Accuracy	±0.25% F.S.
Linearity	±0.5% F.S.
Output	1400-3000 Hz
Temperature Range	−20° to +80 °C
Bolt Sizes	25 mm, #8 rebar, and larger
Length	300 mm (standard)

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Options & Accessories

GK 404 or GK 405 Readout & Probe

VW Strain Gaged Rockbolt

VW Strain Gaged Rockbolt

Features

Applications

specifications

downloads

Options & Accessories

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