2.4 Allowable bearing capacity of shallow foundations The bearing capacity equation is better to express into the following form: q=y.Zmx N'y+y.d.Ng+c.Ne or q=y.ZmxN'y+Yo.d.Ng+c.Ne where y is unit weight of soil below the base of the foundation,Yo is unit weight of soil above the base of the foundation 元 N。=π：cotφ 元 N'y= Ng=1+ cot中-元+4 cotφ- +中 cot- 二+ 2 2.4 Allowable bearing capacity of shallow foundations ▪ The bearing capacity equation is better to express into the following form: max q Nc q =  z N' + dN +c  or max o q Nc q =  z N' + dN +c  where  is unit weight of soil below the base of the foundation, o is unit weight of soil above the base of the foundation +    −   = 2 cot N' +    −    = 2 cot cot Nc +    −  = + 2 cot Nq 1