Hello. My suggestions: --Group the elevator curtains, --Enter the elevator engine room floor, --5. Tick the floor elevator/machine room tick, --Make slab thicknesses 25 cm, --Increase the height of the P02 curtain a little more, --Enter the slab gaps, --Increase the diameters of the floor and raft reinforcements, --Model/support the staircase and solve it together with the building , --one. It gives calculation of punching on the floor in the basement, since the console floor edges are stuck in the columns. The slab edges should not get stuck in the columns, --Make a punching calculation on all columns and see the situation, --Do not make the narrow sides of the columns 40 cm less, --4. If the floor ceiling will not be used, you can reduce the loads, -- I know the place where the construction will be done, weak ground, you can increase the floor carrying capacity by laying a stabilizer under it, Ünver ÖZCAN