Aci 6, or the American Concrete Institute Standard 6, is a business reference document used in the concrete industry. It outlines coding and classification protocols for measuring, analyzing and making technical decisions about concrete construction projects. ACI 6 also covers materials, design and construction practices necessary for providing standardized, quality production of concrete from the very beginning. With this comprehensive guidebook, architects, engineers, contractors and others involved in the concrete trade can rest assured that their building designs are compliant with industry regulations, safe and reliable for years to come.