The periodic inspection and maintenance of bridges represents an extensive and valuable field of work. It is estimated that in the EU there are over 42,000 steel bridges with a replacement value of €350 M. This is why several research projects related to robotic inspection are ongoing. At North Carolina State University, an inspection system based on a four-DOF robot located on the end of a truck-mounted peer crane was developed [13]. A different approach was used at the University of Carlos III of Madrid by developing autonomous climbing robots [14] able to support and transmit onboard sensor data (image, laser, X ray, etc.)—the processing of which is yet another field of research [15], [16].