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Dear Ahsan, 1- consider the relieving pressure of soil as your model shows basement. 2- provide stiff element at the edges of raft as there is basement wall all around. 3-increase in thickness also decreases the pressure, check increasing raft thickness. 4-make sure that actual raft area is provided in SAFE, sometimes it is mistakenly considered less when raft is drawn on center points of the columns, actually you should provide the offset of half column width or depth as per condition on edges. 5- check loads applied on the floors, finishes, walls, decrease where-ever you can, make deduction of windows and doors, check if lighter elements are available, decrease thickness of slabs if possible. 6-Add one column in between all grids if possible, 7-offset your columns some distance 2' or 2.5' inwards, ask the architect, share your problem. 4-if none of the above options and solution provided by seniors work, have review of geotech and go for piled raft. Regards

For local behavior, the beam should do just fine.

It depends on the ratio of local area vs total area. It also depends on the location and importance of localized stress area among other factors. This is engineering judgement beyond the number crunching drudgery. I cant provide this as I am not aware of the project details. You could refer to your seniors for this. And remember do not stop at this. There is always a solution no matter how hard the problem is. For example may be your geotech engineer might suggest a lesser soil stiffness value at this location which will help reduce the stresses. You might increase the local thickness to better distribute the pressure. You could optimize the load combinations or even the load path of superstructure not to have the concentration here. An important point here is if this is localized compression at corner then is it due to lateral loads? If yes then watchout for the reverse that is tension (blue color contours). This will be another whole new problem.