Re: Since the ground results are low, ZG error is given on the raft Hello I made a semi-rigid diaphragm, column, beam, slab, foundation, staircase arrangement in the project. I entered a ground safety enough to save the superstructure because the ground safety stress is very low. If the soil safety is really 9.5 t/m2, you should apply soil improvement or pile foundation. Unver ÖZCAN