There are various means and methods available in the construction industry for the erection of bridges. The Cantilever Method is the most widely used erection method for the construction of the cable stayed bridges. For this type of structural analysis, the geometrical and boundary changes as well as the material properties changes must be considered. However, considerable stresses are produced due to the construction loads in the continuous structure. To determine the cable installation forces, the initial equilibrium state for dead load at the final stage must be determined first. However, in order to obtain the desired cable force which satisfies the suitable range of displacement and member forces, the engineers need to go through the numerous trial & error procedures. To find the cable pretension loads, the unit load method is used in this study. For verification, the Finite Element software (Midas Civil) is used to determine the cable forces using the function n Unknown Load Factor. Also the construction stage analysis for the cable stayed bridge is explained using software. Various parameters are influenced on the cable forces as well as pylon forces. These are back span to main span ratio, pylon height to deck span ratio, Pylon Geometry, Cable system arrangements are varied, results are validated and all the details are given in this paper. © IAEME Publication.