In a lot of construction projects you will find a requirement of the precast concrete manufacturer and/or erector to be certified by "PCI", or the Precast/Prestressed Concrete Institutue. · Why does this matter? · What difference does it make? · It's just concrete, isn't it? Well, yes. And no! While concrete itself is a pretty-to-easy understand material and dates back (literally) thousands of years, the safe, accurate, and quality design, fabrication, and installation of precast concrete products requires several layers of knowledge, skills, and experience.