This presentation summarizes axial force on structural members. Axial force is a compressive or tensile force acting along the longitudinal axis of a member. Eccentric loading produces both axial force and bending moment in a member. Examples of axial force include the compressive force on columns supporting a building roof. The nature, effects, and calculation of axial force are discussed. An example problem demonstrates solving for reactions on an axially loaded steel rod using compatibility and equilibrium equations.