Suggestion to add plastic section modulus to the list of calculated section properties

[Joanna Sangalang]

Regarding plastic section modulus, I think it can also be computed for arbitrary sections. The areas in tension and in compression just need to be identified for the section as well as the distance of their local centroids to the plastic neutral axis.

Since STARK triangulates the geometry of a section and then computes for the properties, perhaps in computing for the plastic section modulus, the areas in tension and in compression may be identified first and then proceed with triangulation of each of the geometry in tension and in compression. Then the distance of the centroids to the plastic neutral axis can also be determined.