The telescopic cantilever beam is widely used in different types of cranes. These structures are flexible; it can expand or shrink according to the operating conditions. The dynamic changes of the total length of the structure lead to time-dependent vibrational characteristics. In practice, CAD modeling for this case is a challenging matter due to the nature of the problem of analyzing stress and deformation occurring during the operation of the crane. This research discusses the feasibility of finding a solution for the design problems initialized during the failure of the telescopic cantilever beam through the application of Finite Element Analyses (FEA) in order to find the ideal dimension of the structure which represents the best design for the telescopic cantilever beam.