Abstract
Currently, ground penetrating radar (GPR) is commonly used in civil engineering. It can be determined the number and location of steel reinforcement and other subjects in concrete or similar materials. The article is focused on using GPR for determination of the main wiring location. The wall where the main wiring was located were demolished as a part of the reconstruction. By this step the new entrance hall were created. The position and course of the main wiring were determined by GPR measurement. During demolition work were used hand tools in area with installations to avoid the damage. A lower resolution was found when the individual wires were close together. However, the position of the marginal cables was determined with an accuracy of one centimetre.
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