The timber box section (a) of Problem 14-29 is used as a simply supported beam on an 18-...

The timber box section (a) of Problem 14-29 is used as a simply supported beam on an 18-ft span length. The beam carries a uniformly distributed load of 500 lb/ft, which includes its own weight. Calculate the maximum induced bending stress.

Problem 14-29

Calculate the section modulus with respect to the X—X axis for the sections shown.