Hello, The ladder is not supported correctly, so the analysis time is longer. (7.17 minutes on my computer) When you delete the ladder on all floors, the analysis time decreases. (6.51min). When you select Static eccentricity in the analysis settings, the time becomes 2.5 minutes. Finally, this structure is not necessarily a semi-rigid solution. Therefore, if the rigid diaphragm solution is marked and static eccentricity is selected, the time analysis time decreases from 7 minutes to 28 seconds on my machine Mathematical model of the Slabs as Semi-rigid (Shell) decreases the analysis time. affects selection. It then affects the dynamic eccentricity. Later, the presence of basement floors in the building affects it. As the curtain and floor finite element sizes get smaller, the analysis time gets longer.