Calculating the Elastic Section Modulus (Sx), Plastic Section Modulus (Zx), and Shape Factor (f) for a Built Up T-shape

June 8, 2017 Abdul Siraj, P.E.

In this post, I will discuss the second example in our steel design course covering the analysis and design of beam members. The goal of this steel design example is to calculate the elastic section modulus (Sx), plastic section modulus (Zx), and shape factor (f) for a built up T-shape. We are using the 13th edition of the AISC Steel Construction Manual.


The problem statement states,


Calculate the shape factor of the section below for x- axis.

Material: A572 Grade 50