An analysis method with lumped construction sequences for the column shortening of tall buildings was proposed and was investigated regarding its efficiency. The lumped model showed the analysis results that were close to the results using the detailed model in post-installation shortening as well as total shortening. Different arrangement methods for the lumped model were also investigated. The size of the lumping was studied and 1/15 was recommended considering the efficiency of the lumped model. The saw-toothed distributions of the differential post-installation shortening and the bending moment can be modified by the proposed curve-fitting method. The proposed method can be used more effectively at the design stage of tall buildings.