Scratching your head, trying to figure out how to protect underground lines in aging brick structures? Call Advance Concrete Products Co! At a busy intersection, Woodward and Congress in Detroit, electrical and telephone lines could not be moved or interrupted, and had to be protected from roadway traffic. Rectangular simple shapes would not fit, so the precast concrete sections had to be made to fit parallel with the old wall dimensions. The contractor called Advance Concrete to measure at the job site. We set up custom forms inside our manufacturing facility, poured and cured the high-strength concrete, and unloaded with our crane into the excavation within three working days. Let Advance Concrete do the hard work, and make your job easier.