Solve Prob. 411 using singularity functions. Use statics to determine the reactions. Prob. 411, A simply supported

Solve Prob. 4–11 using singularity functions. Use statics to determine the reactions.

Prob. 4–11, A simply supported beam loaded by two forces is shown in the figure. Select a pair of structural steel channels mounted back to back to support the loads in such a way that the deflection at midspan will not exceed ½ in and the maximum stress will not exceed 15 kpsi.

Use superposition.

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450 lbf 300 lbf 6 ft 4 ft 10 ft 0