This presentation summarizes axial force and how it relates to structural members. It defines axial force as a force that tends to elongate or shorten a member, usually measured in pounds, and acts along the longitudinal axis of the member. Examples are given of how axial force acts on columns, beams, shafts, and cylinders. The key concepts of concentric and eccentric loading are explained. Formulas for calculating axial force are provided. The approach of using equilibrium, compatibility, and superposition to solve statically indeterminate problems is described. An example problem demonstrating this approach is shown.