Vibrating Wire Strain Gauge is designed to measure strain in supplemental steels such as struts and piles of temporary structures. Once the gauge is strained, frequency of vibrating wire is changed, then plucking coil generate resonance frequency and it is delivered to measuring instrument. At this time, the measuring instrument will be shown after changing this signal into strain. Then measured data will be converted into stress or load by modulus of elasticity and the surface of the steels.