This document discusses the moment distribution method for analyzing indeterminate beams. It begins with an overview and introduction to the method, which was developed by Prof. Hardy Cross in 1932. It then describes the basic principles through a 5 step process: 1) joints are locked to determine fixed end moments, 2) joints are released allowing rotation, 3) unbalanced moments modify joint moments based on stiffness, 4) moments are distributed and modify other joints, 5) steps 3-4 repeat until moments converge. Key terms like stiffness and carry-over factors are also defined.