Question $4$ : Shear Stress $-$ Shear Centre

An extruded beam has the cross section shown in Figure $4$ below. Determine: $-$

a$)$ the distribution of the shearing stresses caused by a $50kN$ vertical shearing force applied at $O,$ and

$(9)$

b$)$ the location of the shear centre $O.$

$(9)$

Figure $4$: Thin$-$ wall $\text{'}$C$\text{'}$ Section