#ndt Bridge inspection relies on a variety of visual and mechanical measurement techniques that are used to determine bridge safety. Gusset plates are often assessed with a visual inspection. Corrosion of bolts is measured using calipers. Corrosion pits are typically measured using pit gauges. The variability in these techniques results in a large uncertainty in the assessment. While many inspectors and engineers recognize the inherent uncertainty associated with these visual and mechanical methods, the impact o
Source: NDT