Alternative Suspension Method; Figure 11: Suspending Strain Gauges Between Rebar; Figure 12: Alternative Method For Attaching Gauges To Rebar - Geokon 4200 Series Instruction Manual

8 | INSTALLING THE GAUGES IN CONCRETE | GEOKON
6. Attach the plucking coil using a hose clamp. Tie the instrument cable off to
one of the rebar using nylon cable ties.
Rubber Tape
Wire Tie
Rubber Tape
Wire Tie
FIGURE 11: Suspending Model 4200/4200L/4200HT Strain Gauges Between Rebar

4.3 ALTERNATIVE SUSPENSION METHOD

Tie two short pieces of steel rebar to the existing rebar using nylon cable ties, as
shown in the figure below. Then tie the strain gauge to the short pieces of rebar
again using more nylon cable ties. This method avoids the resonance problems
associated with the previous method.
Instrument Cable
Nylon Cable Ties
Nylon Cable Ties
FIGURE 12: Alternative Method for Attaching Model 4200/4200HT Strain Gauges to
Rebar
Nylon Cable Tie
Instrument Cable
4200
Coil Assembly
Short Lengths
of Rebar
Wire Tie
Rebar or
Tensioned Cable
Wire Tie
Nylon Cable Ties