A.柱寬的1/2 B.梁寬的1/2 C.柱寬的1/4 D.梁寬的1/4
A.Fc1 < Fc2 < Fc3 B.Fc2 < Fc1 < Fc3 C.Fc2 < Fc1 = Fc3 D.Fc1 = Fc2 < Fc3