Recently, complex geometries appeared increasingly especially in mega cites as a symbol of power and as indicator of urban society development. In addition to the latest advances in digital and computational tools that encourage designers to explore finite number of iconic and complex forms. The design, fabrication and construction of gigantic structures of these forms is becoming increasingly difficult with the increase in geometric complexity. Also, the cost of constructing these complex buildings increases, as a result of the increase in demand for steel usage in the past years and its expensive cost. And as known, self-weight of these structure increase with the increase in the building height and its increasing complexity. So, it is of importance to utilize structural analysis in the early stages of the design process, so as to generate forms that are structurally efficient and then the structure performance is considered the main deriver in form generation of these projects. This study focuses on studying form finding process of two types of buildings: high-rise buildings and complex wide span steel structures (low rise), that adopt an integrated design approach: generative structural performative approach to gain a detailed understanding of its capabilities and to capture the complexities of utilizing it, therefor, evaluating its effectiveness in generating forms that achieve balance between aesthetic aspects and structural efficiency.