For the pedestal of Problem 17.11, assume that the load is placed at the computed eccentricity. Calculate the maximum tensile and compressive stresses developed on a horizontal plane 3 ft below the...

For the pedestal of Problem 17.11, assume that the load is placed at the computed eccentricity. Calculate the maximum tensile and compressive stresses developed on a horizontal plane 3 ft below the top of the pedestal

Problem 17.11

A concrete pedestal is in the shape of a cube and is 6 ft on each side. The pedestal supports a superimposed load of 40,000 lb located on the Y–Y axis, as shown. Calculate the maximum eccentricity e for zero tension at the base of the pedestal. Include the weight of the pedestal using a concrete unit weight of 150 pcf