in staadpro i got mz>my then in which direction i have to orient the column in rcc design
You can press "Shift+O" which will show the local axis orientation of the members. By default, local X,Y & Z axis is denoted by blue, red and green colored axis. if Mz is coming higher then you should orient major axis is such a way that it will take the higher moment. In your case, provide longer dimension perpendicular to the local Z axis.