The simple span of 6 m W shape was used as a bridge crane runway girder. Assume that the crane wheel imparts a vertical load of 60 kN and a lateral load of 6 kN at the midspan applied at the top flange of the girder. A standard rail weighing 65 kg/m will be used. Assume that the top flange is not laterally braced between end supports.
Properties of W section:
Sx = 1280 x 10^3 mm^3 Fbx = 207 MPa
Sy = 361 x 10^3 mm^3 Fby = 238 MPa
a. Draw the loading diagram (attached in the solution set)
b. Determine the bending stress along the x-axis.
c. Determine the bending stress along the y-axis
d. Determine the ratio of the actual bending stresses to allowable bending stress.
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