This study aims to analyze the flexural capacity of a combination of Castellated and Tapered beams using ANSYS numerical simulation. The beams were tested with two support systems: roller-hinge and cantilever, using variations of WF, Castella, and Tapered Castella geometry. The results show that the taper combination can increase the flexural capacity by 34–35% compared to conventional WF beams and 16–21% compared to prismatic Castella beams. This is because the geometry of the taper beam can increase the inertia of the profile, especially at the maximum moment position. The contribution of this study is the proof of structural efficiency through the distribution of geometry according to the maximum moment in each support system. This study shows the potential application of this system in the use of modern building structural elements.
                        
                        
                        
                        
                            
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