he current trends of construction industry demand tall and lighter structures. These tallrnstructures are very sensitive to Lateral loads induced by Earthquake, wind or ocean wavesrnthan that of the gravitation loads. To resist the lateral loads several techniques arernavailable, out of the several techniques available diagrid structures are found as morernstructurally efficient over other type of lateral load resisting system in developed countriesrnrecently. rnThis type of lateral load resisting system (diagrid) has generated a good interest fromrnarchitects on aesthetic aspect and structural Engineers by their structural efficiency.rnDiagrids or diagonal grids are a structural design approach for constructing buildings thatrncombine the resistance to gravity and lateral loads into a triangulated system of membersrnthat eliminates the need for vertical columns. If this diagrid system constructed withrnoptimal configuration, the material consumption will efficiently increase. rnThis research paper, base the study on the previous researches and accept the structuralrnefficiency of diagrid structures than the other lateral load resisting system, mainly focusedrnon the seismic performance evaluation of three different stories (G+10, G+16 and G+22)rnwith different diagrid angle (53.13Ëš, 69.26Ëš, 75.57Ëš & 79.22Ëš) located in two differentrnground type (A & C). the results from the twenty-four model cases were compared tornverify the structural efficiency with different structural configuration using designrnresponse spectrum analysis in ETABS 2016 v16.2.1 software for steel diagrid in reinforcedrnconcrete building. rnThe analysis and design of these twenty-four (24) models of diagrid structures followedrnthe basic steps and approaches that are operational and practical in real world. Proposedrndiagrid structure cases were to be situated in Hawassa, whose seismic zone is categorizedrnunder Zone IV according to the ES EN 1998-1:2015 annex D Table. The lateral loadrnanalysis of the study has been based on the new code ES EN 1998-1:2015. The analysisrnhas been done using finite element software ETABS 2016 v16.2.1. The performancernevaluation of these twenty-four case studies of diagrid buildings is mainly based on linearrnanalysis parameters, such as Fundamental vibration period, story displacement and interstoryrndrift.Based on the model cases considered in this study, Results has showed that Diagridrnstructure has difference fundamental vibration period, story displacement and inter-storyrndrift based on their module angles considered for each case. From the linear analysis ofrntwenty-four of G+10, G+16 and G+22 story buildings, in ground type A & C with fourrndifferent module angles, a two story module or module diagrid angle 53.13Ëš has shown arnsmaller top displacement, smaller inter-story drift and smaller fundamental time period forrnG+10 story building. Whereas module diagrid angle 69.26Ëš and 79.22Ëš has shown a smallerrntop displacement, smaller inter-story drift and smaller fundamental time period for G+16rnand G+22 story buildings respectively. rnTherefore, according to the linear analysis results and comparative study of this thesis, itrncan have concluded that for a better and significantly good performance, finding thernoptimal module angle with respect to height to width aspect ratio is very recommendable.