The I-beam shape in Figure is to carry two identical concentrated loads of 2.25 kN each, s...

The I-beam shape in Figure is to carry two identical concentrated loads of 2.25 kN each, sym­metrically placed on a simply supported beam with a span of 0.60 m. Each load is 0.2 m from an end. Which of the plastics from Appendix A-20 would carry these loads with a stress due to bending no more than one-third of their flexural strength?

FIGURE