The Strain Gauges
Specifications called for bonded strain gauges on the strands and the saddle anchors holding the strands. The strand gauges were designed specifically for seven-wire strands. Redundant layers of moisture protection, physical protection, and sealing were applied to help the gauges withstand the harsh weather conditions of the Northeast.
Two “no-stress” gages were installed to provide data for temperature corrections. Any changes in strain in these gauges would be due solely to changes in temperature.
All of the strain gauges were wired to a central location and provided bridge engineers with real time data during the loading and lock-off of the helper strands.
Over the long term, the monitoring system will provide valuable data for evaluating the overall structural health of the bridge.