Application of the pushover methods have been increased in last decade. In recent years different advanced pushover methods have been proposed to account the higher modes effects and changes in the modal attribute during inelastic phases. Generally in these advanced methods multiple pushover analyses with lateral load corresponding to the considered elastic mode shapes are conducted separately, and then the total seismic response is estimated by combining the responses due to each modal load (multi-run). Since in the inelastic domain the modes are coupled so using of the modal decomposition concepts are not valid in the nonlinear range. Therefore the multi-run pushover methods encounter with some theoretical problems. These methods are not able to reflect the yielding effect of one mode in the other modes and the interaction between modes in the nonlinear range. For this purpose, some researchers have developed enhanced single-run modal methods in which the structure is pushed with combined modal forces. The modal combination concept is used to define the load pattern rather than to combine the nonlinear responses due to each mode. In this paper a new advanced single-run pushover method has been proposed. The proposed method is applied to SAC-9 building. This provides a good estimation of the peak inelastic drift response.