If the soil exerts a trapezoidal distribution of load on the bottom of the footing, determine the intensities *w*_{1 }and *w*_{2} of this distribution needed to support the column loadings.

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Step 1Usually, under the footing structure the soil pressure distribution happen when the column load P is applied.  The soil pressure distribution may varies with the footing type, applied load and also with cohesion less soil and cohesive soil type.Step 2Show the free body diagram as below;consider the trapezoidal load into two section, section 1 udl load and section 2 UVL loading.Calculate the distance x as below:x=13×8=2.667 mSummation of all th ... See the full answer