The document discusses seismic risk assessment of vertically irregular reinforced concrete (RC) framed buildings. It focuses on open ground storey (OGS) buildings designed using different magnification factors, as well as stepped irregular buildings with specific geometry configurations. Fragility curves are developed for each type of building using performance-based seismic design modeling and analysis. The conclusions drawn are that an OGS building with a magnification factor of around 1.5 performs similarly to a fully infilled building. However, increasing the magnification factor improves OGS building performance but makes adjacent stories more vulnerable.