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Multi-storey RC Structure has subjected to most dangerous earthquakes. It was found that a main reason for the failure of RC building is irregular distributions of the mass, stiffness and strength or due to irregular geometrical configurations. In a reality, many existing buildings contain an irregularity due to functional and aesthetic requirements. However, past earthquake records show the poor seismic performance of this structure. This is due to an ignorance of the irregularity aspect in formulating the seismic design methodologies by the seismic codes The review of seismic design codes and reported research studies show that the irregularity has been quantified in terms of magnitude ignoring the effect of a location of an irregularity. In the present work vertical Irregularities were analysed at various floor levels and comparative results were plotted from this it is found that a more amount of research can be done on this topic.
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