Abstract: A method of determining the tension in an elongated rod is described. The method includes impacting the rod and measuring the vibration response of the rod. Further, the method entails generating a theoretical vibration response of the rod based in part at least on the structural properties of the rod. Thereafter, the method entails adjusting the theoretical vibration response to cause the theoretical vibration response to conform with at least a portion of the measured vibration response. Based on the adjusted theoretical vibration response, the tension of the rod is determined.

Abstract: A method of determining the tension in an elongated rod is described. The method includes impacting the rod and measuring the vibration response of the rod. Further, the method entails generating a theoretical vibration response of the rod based in part at least on the structural properties of the rod. Thereafter, the method entails adjusting the theoretical vibration response to cause the theoretical vibration response to conform with at least a portion of the measured vibration response. Based on the adjusted theoretical vibration response, the tension of the rod is determined.

Abstract: A method of mapping steel reinforcements in an existing concrete foundation. The method includes determining the depth of the concrete foundation. Further the method entails transmitting radar signals into at least one section of the concrete foundation and collecting reflection data in response to the radar signals being transmitted into the concrete foundation. Based on the collected reflection data, determining the general location of at least some of the steel reinforcements in the concrete foundation. Thereafter, surgically cutting into the concrete foundation and exposing at least some of the steel reinforcements in a portion of the concrete foundation. Once some of the steel reinforcements are exposed, the method entails measuring the size and spacing of the steel reinforcements.