FE Civil Exam Prep 57, Steel Beam Design — Plastic Modulus and LTB

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - The difference between the plastic modulus (Z) and elastic modulus (S), and how to calculate the plastic moment (Mp). - How Lateral-Torsional Buckling (LTB) can reduce a steel beam's capacity based on its unbraced length (Lb). - The three LTB zones defined by the limiting lengths Lp and Lr, and which equations to apply for each. - To avoid the common exam trap of selecting the full plastic moment (Mp) as the answer when LTB controls the design. - The importance of unit consistency, especially converting the final moment from kip-inches to kip-feet. For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep