A railroad tie (or sleeper) is subjected to two rail loads, each of magnitude P = 175 kN, acting as shown: of the tie, which has cross-sectional dimensions b = 300 mm and h = 250 mm. Calculate the The reaction q of the ballast is assumed to be uniformly distributed over the length maximum bending stress Omax in the tie due to the loads P, assuming the distance L = 1500mm and the overhang length a = 500 mm. P |P h

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