A beam of wide-flange shape, W 8 ×28, has the cross section shown in the figure. The dimensions are b = 6.54 in., h = 8.06 in., tw = 0.285 in., and tf = 0.465 in. The loads on the beam produce a shear force V = 7.5 k at the cross section under consideration.
(a) Using centerline dimensions, calculate the maximum shear stress σmax in the web of the beam.
(b) Using the more exact analysis of Section 5.10 in Chapter 5, calculate the maximum shear stress in the web of the beam and compare it with the stress obtained in part a.
