A hanger is made of two bars of different sizes. Each bar has a square cross-section. The hanger is loaded by three-point loads in the mid vertical plane as shown in the figure. Ignore the self-weight of the hanger. What is the maximum tensile stress in $\mathrm{N} / \mathrm{mm}^{2} $ anywhere in the hanger without considering stress concentration effects?
- $15.0$
- $25.0$
- $35.0$
- $45.0$