What the column stirrup spacing will be depends on a few things. According to the regulation, it is stated that the column cannot be more than 1/3 of the short side in the upper and lower wrapping regions. This rule applies regardless of account and loads. For example, if your column is 25, the spacing of stirrups can never be more than 8 cm. Increasing the column short side dimensions helps to open the stirrup gaps. However, in order to reduce the shear forces on the column, the presence of shears that can carry more horizontal loads will affect the stirrups. You can add curtains to appropriate places in your model.