When I solve all the blocks together in the dilatation building, the columns that do not give an error give a joint zone error when solved alone, shouldn't the results be the same? In the modal analysis report, I saw that the periods are different, depending on this, the St value changes, etc. I wonder if it is because of this. You can examine the project file from the link
.[/ quote] Hello, In the project you added, due to the elevation difference between the 2nd and 3rd blocks, the raft is attached to the basic curtains at the marked place in the picture. Model the dilatations in separate project files as there is a level difference between the blocks. Good work