A wall footing has a width of 1.8 m supporting a wall having a width of 0.16m. The thickness of the footing is 0.39m, and the bottom of the footing is 1.7m below the ground surface. If the gross allowable bearing pressure is 178 kPa, determine the actual critical shear acting on the footing, in KN. P(dead load) = 284 KN/m P(live load) = 130 KN/m yconcrete = 24 KN/m3 ysoil = 18 KN/m3 Depth of top of footing to NGL = 1 m concrete cover = 75mm assume db 16mm dia.