In addition to flying and ordinary buttresses, brick and masonry buttresses that support wall corners can be classified according to their ground plan. A clasping or clamped buttress has an L shaped ground plan surrounding the corner, an angled buttress has two buttresses meeting at the corner, a setback buttress is similar to an angled buttress but the buttresses are set back from the corner, and a diagonal (or 'French') buttress is at 45 degrees to the walls.
The gallery below shows top-down views of various types of buttress (dark grey) supporting the corner wall of a structure (light grey).
Clasping or clamped buttress
Diagonal or 'french' buttress