고체역학 (Beer) — Analysis and Design of Beams for Bending: Problem 5.83

5.83 Assuming the upward reaction of the ground to be uniformly distributed and knowing that the allowable normal stress for the steel used is 170 MPa, select the most economical wide-flange beam to support the loading shown. [Loading description from Fig. P5.83: A beam AD of length $L = 2.5\text{ m}$ ($0.75\text{ m} + 1\text{ m} + 0.75\text{ m}$). A downward distributed load acts between $B$ and $C$ (span of $1\text{ m}$) with a "Total load = 2 MN". The ground provides a uniformly distributed upward reaction over the entire length $AD$.]