The picture above shows a gondola lift with the dimensions given for its supporting arm.

Determine the maximum normal stress developed in section a-a. Calculate also the principal stresses σ_{1}, σ_{2},
σ_{3} and τ_{abs-max} at the point of maximum stress.

The picture above shows a gondola lift with the dimensions given for its supporting arm.

Determine the maximum normal stress developed in section a-a. Calculate also the principal stresses σ_{1}, σ_{2},
σ_{3} and τ_{abs-max} at the point of maximum stress.