For a thin-walled section shown in the figure, points $\text{P, Q}$, and $\text{R}$ are located on the major bending axis $\mathrm{X}-\mathrm{X}$ of the section. Point $\mathrm{Q}$ is located on the web whereas point $\text{S}$ is located at the intersection of the web and the top flange of the section.
Qualitatively, the shear center of the section lies at
- $\text{P}$
- $\text{Q}$
- $\text{R}$
- $\text{S}$