In ASCE 7-22, the minimum spectral acceleration (S_(a,min)) is defined to prevent excessive reduction of design forces for buildings with long fundamental periods. This study investigates the effect of this parameter on the seismic safety of three tall reinforced concrete buildings with dual structural systems (combining moment-resisting frames and shear walls) having 39, 49, and 59 stories. All three buildings were initially designed according to ASCE 7-22 provisions and then subjected to nonlinear dynamic time-history analyses using 11 pairs of recorded ground motions scaled in accordance with ASCE recommendations. The methodology follows recent approaches in performance-based design literature . Seismic performance assessment was conducted based on ASCE 41 acceptance criteria, including interstory drift limits and plastic hinge rotations. Results indicate that despite the increase in height, the 59-story building exhibits better seismic performance in terms of maximum interstory drift and plastic hinge rotations in beams and columns compared to the 49-story building. The main reason for this phenomenon is the dominance of S_(a,min) over the design spectrum at the fundamental period of the 59-story building, which leads to an effective increase in design forces and consequently reduces nonlinear deformations. These findings demonstrate that uniform application of S_(a,min)across a wide range of building heights may lead to uneconomical design for mid-rise buildings and over-conservative design for very tall buildings.