The simply supported beam shown in Figure P15.21a/ 22a supports a uniformly distributed load of w = 75 kN/m. The cross-sectional dimensions of the beam shown in Figure P15.21b/ 22b are b f = 280 mm, t...

The simply supported beam shown in Figure P15.21a/ 22a supports a uniformly distributed load of w = 75 kN/m. The cross-sectional dimensions of the beam shown in Figure P15.21b/ 22b are b_f
= 280 mm, t_f
= 20 mm, d = 460 mm, t_w
= 12 mm, and y_H
= 110 mm. Determine the principal stresses and the maximum shear stress acting at point H. Show these stresses on an appropriate sketch.