The shear stress distribution of a beam section has a shape where the shear stress decreases with an increase in the width of the section and vice-versa. If the shear stress distribution diagram shows a sudden change (discontinuity) at the junction of the flange and the web, which of the following beam cross-sections does it represent?

The shear stress distribution of a beam section has a characteristic profile where the shear stress is zero at the top and bottom fibers, increases parabolically, and exhibits sudden jumps at the junction of the flange and the web. Identify the shape of the beam section that corresponds to this distribution.

Which of the following is NOT a typical stress distribution diagram at the base of a circular chimney?