Steel and concrete structures are subject to corrosion, fatigue, Wear and structural design flaws. Remote visual inspection of bridges can utilize industrial videoscopes or video borescopes to inspect inside voids, cavities and other impossible to reach areas to determine the condition of a bridge.
Remote visual inspection of bridges a videoscope or Video borescope is typically used to evaluate the condition of areas difficult to access for visual inspection. These instruments can be snaked to various internal areas of a bridge and transmit images viewed by a video scope camera attached to the tip of a thin flexible tube that can be as long as 15 meters. Common applications in bridge evaluation include bearing inspection and tendon inspection. Remote visual inspection access can be through existing holes/cracks or small holes (typically 10-20mm) drilled into the structure.