Beam design details for laterally unsupported

Laterally Unsupported Beam Design

calculating  Bending Moment (M=W* x L2 / 8) 

                   Shear Force(V = W* x L / 2)

                   Section Modules(Z = M /(σbc or σbt))

Calculated Average Shear Stress ( ζva = V /(h x Tw))

Permissible Shear Stress(ζv = 0.4 x fy)

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http://www.4shared.com/office/cqjfMq0l/Laterally_Unsupported_Beam_Des.html