What is Deflection & Max Defalcation? Deflection in structural engineering refers to the displacement or bending of a beam or structural element under load. It is the degree to which a structure deforms when a force is applied. In simple terms, deflection is how much a beam or other structure moves from its original position due to applied loads. Max Deflection (Maximum Deflection): refers to the largest amount of deflection that occurs at any point along the beam under the given load. It is usu