This is where the comes in. It acts as a bridge between theory and practice.
The American Concrete Institute (ACI) publishes the Building Code Requirements for Structural Concrete (ACI 318) . This code is the legal standard for concrete construction in much of the United States and many parts of the world. However, the ACI code is often dense, mathematical, and strictly prescriptive. It tells you what to do, but rarely explains why or how in simple terms.