This document provides information on the structural design of a simply supported reinforced concrete beam. It includes: - A list of students enrolled in an elementary structural design course. - Equations and diagrams showing the forces and stresses in a reinforced concrete beam with a singly reinforced bottom section. - Limits on the maximum depth of the neutral axis according to the grade of steel. - Examples of analyzing the stresses and determining steel reinforcement for a given beam cross-section. - A design example calculating the dimensions and steel reinforcement for a rectangular beam with a factored uniform load.