A beam of wide-flange cross section (see figure) has the following dimensions:
b = 120 mm, t = 10 mm, h = 300 mm, and h1 = 260 mm. The beam is simply supported with span length L = 3.0 m. A concentrated load P = 120 kN acts at the midpoint of the span.
At a cross section located 1.0 m from the left-hand support, determine the principal stresses (1 and (2 and the maximum shear stress Tmax at each of the following locations: (a) the top of the beam, (b) the top of the web, and (c) the neutral axis.