A square foundation is 3mx3m in plan. The soil supporting the foundation has a friction angle of Phi =21 degrees and C= 22 KN/m^2. The depth of foundation (Df) is 1.8 m and general shear failure occurs in the soil. If the water table is located at a depth of 2.5 m from the ground surface. Use the unit weight of soil (gamma) above the water, table as 17.5 KN/m^3 and the saturated unit weight of soil (gamma_Sat) is 19.5 KN/m^3. Use FS=4; Determine the maximum allowable load on the foundation using VESIC's Recommendations for water table correction.

Use Terzaghi equation and Terzaghi table.

A square shallow foundation has to carry a gross allowable total mass of 15,290 kg. The depth of the foundation is 0.7 m. The load is inclined at an angle of 20° to the vertical. The soil beneath and above the foundation is sand with effective friction angle of 30° and unit weight of 18 kN/m*. The ground water table is at a depth of 5 m below the bottom of the foundation. Determine the width of the foundation to achieve a factor of safety of 3.