SECTION 6.5Bending of Unsymmetric Beams539Problem 6.5-11A steel post (E±30²106psi) havingthickness t±1/8 in. and height L±72 in. supports a stopsign (see figure). The stop sign post is subjected to a bendingmoment Mhaving its vector at an angle uto the zaxis.Determine the orientation of the neutral axis andcalculate the maximum tensile stress stand maximumcompressive stress scin the beam. Assume that u±30° andM±5.0 k-in.Use the following numerical properties for the post: A±0.578 in2, c1±0.769 in., c2±0.731 in., Iy±0.44867 in4, and Iz±0.16101 in4.Solution 6.5-11M±5k inu±³30°Post: A±0.578 in.2c1±0.769 in.c2±0.731 in.Iy±0.44867 in.4Iz±0.16101 in.4BENDING MOMENTSM
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Second moment of area, maximum tensile stress, Compressive stress, maximum tensile, Unsymmetric Beams