Techniques for structural health monitoring (SHM) as they are called, are gaining acceptance in all productive sectors as a reliable and economical to alert safety engineers in the initial stages of formation defects, and to warn them as soon as possible about the need for appropriate maintenance. This type of measurement has been done on other types of structures, aircraft, pipelines, buildings, overpasses, fulfilling the purpose of analyzing and visualizing the structural behavior, allowing be provide wear and structural abnormalities. In buildings are being detected this need over time, the stresses on a bridge caused by traffic, weather and own construction, expansion or renovation, can cause the formation of tiny cracks in steel structures and concrete. Exposure to wind, rain and other elements can cause corrosion, which can also be a structural hazard. With sensors continually checking the appearance of the first signs of wear, engineers can detect cracks much earlier than traditional methods, perform corrective maintenance at the right time, and possibly prevent massive damage. Like nerve endings in the human body, permanently installed these sensors in place offer levels of vigilance and sensitivity to problems that periodic general inspections cannot provide.