The earthquake behavior of structural systems strongly depends on the geometry of the building. Structural irregularities are one of the major causes of damage amplification under seismic action. Past earthquakes, indeed, have shown that buildings with irregular configurations or asymmetrical distribution of structural properties are subjected to an increase in seismic demand, causing greater damages. If the earthquake damages are examined, it can be seen that structures that have overhangs are damaged more than the others. In this study, the effect of overhangs of RC frame on the torsional response is evaluated. Both torsional irregularity factors and the torsional moment ratio of the corner column are evaluated. The model has 6 and 9-story buildings, buildings are 20 m by 20 m in the plan. They have 4@5 m bays along with X and Y directions, 5 different overhang alternatives, and 3 different overhang lengths. Structural systems are modelled using SAP2000 software and investigated under earthquake load using response spectrum analyses methods. Results show the torsional moment ratio reached approximately 9 times higher than those in the regular frame.