Extracted text: 4: AW section is used as a beam without lateral support. A-36 steel is used. Properties of W- Section: A= 24709.6 mm d 840.74 mm bf 292.35 mm tf = 21.72 mm tw = 14.73 mm 1=2792.9 x 10 mm 1, = 90.74 x 10 mm S, = 6653.15 x 10 mm S, = 621.07 x 10 mm r,= 335.28 mm r 60.45 mm %3D a. Compute the allowable bending stress if it has a simple span of 3.5m b. Compute the allowable bending stress if it has a simple span of 4m. C. Compute the allowable bending stress if it has a simple span of 7m. d. Compute the allowable bending stress if it has a simple span of 9m.