Problem 9.23 - Beam Design

Problem Statement

A wide flange beam supports the distributed load shown, where w0 = 5 kN/m. If length L = 3 m and the allowable stress is σ = 150 MPa, what is the lightest W-beam in Appendix A that could be used for the beam?

An I beam of length 2L is subjected to triangular loading wo. The triangular load increases from A to L to a peak of wo, and decreases from wo to 0 from L to C.

Figure 1: An I beam is subjected to a triangular load.

[Problem adapted from © Kurt Gramoll CC BY NC-SA 4.0]