A = rolled steel channel (I 8.87 x 106 mm, I₁ = 40.3 x 10¹ mm²) is used as a simply supported beam (purlin) in a roof truss (Fig. 9-20). If the span of the purlin is 4 m, deter- mine the maximum ten- sile and compressive stresses in the beam due to a uniformly distrib- uted load of 1 kN/m. x 53mm y k Plane of the load 178mm 13.7 mm Fig 9.20 2

Given: A steel girder with tallow = 400psi is bolted together as shown has shear, V = 5ksi on the cross-section. Wf flange thickness, tr= 1.5in flange width Wf = 10in web thickness, tw = lin web height, hw = 12in I = 1516.5 in“ Wf Determine: Using exact equations for shear stress and flow, determine the spacing of the top bolts, s, if each bolt can resist F = 550lb