A method of identifying and installing a plurality of electrical or other signal carriers, pipes, tubes or the like within a building structure. The method includes the steps of determining the paths along which the various carriers are to be laid out within the structure, formulating a retrievable record of such paths, storing and retaining the retrievable record of such location information in an accessible computer memory or the like, and assigning a unique identifying expression to each of the carriers. The unique identifying expression is reproduced on spaced apart portions of each of the carriers, and the carriers are then installed according to plan. By using the unique identifying expression to access the computer memory, the location of all points along each carrier can be determined.