I have an exterior wall condition where the exterior wall at the "corner" of the building is at an angle, but the roof above comes to a complete corner producing an "overhang". BOMA illustration 6A shows a similar situation in the bottom left corner of the building. Would that exterior portion of that corner be considered in the IGA? If so, why? The wall is not at an angle because of a door-set-back. It is at an angle for design purposes. I am using BOMA 2010A.