For the square footing shown below, use the general bearing capacity equation to determine the gross allowable load (kips) that the footing can carry. Assume a general shear failure. y = 98 pcf; Y sat = 120 pcf; c = 0; p = 30°; Df = 4 ft; D = 1 ft; B = 3 ft; F.S. = 3.0 %3D

Subject: Principles of Foundation Design (Use NCSP) A rectangular footing is to be used to support a 300x400 (*400mm side is parallel to the long dimension of the footing) column loaded with 420 kN dead load and 540 kN live load. One side of the footing is 4.0m. Use effective soil pressure of 70 kPa. f'c=35 MPa and fy=420 MPa. Use minimum steel ratio for longitudinal bars as 0.0018. •Calculate the required thickness of the footing (mm) based on wide beam shear. db=16mm. Size of footing should be multiples of 10mm (Answer: 300) •Calculate the required thickness of the footing based on two-way shear. db=16mm (Answer: 430) • Calculate the required number of 16mm bars along long direction. . Use the governing thickness based on shear requirements. (Answer: 22)