I have seen this in the manual. But I am confused why the software is not considering the opening just at the face of the column. As I move the opening away from the face of column around "d" distance, it starts considering the opening and reduces the punching perimeter.
I have a small opening which is at the face of the column. While calculating punching shear the software is not reducing the punching perimeter. The size of column is 24" x24". The slab is 8" thick. and the opening is 8"x8". I have attached the screenshots.
Does any have idea about this...