Terminology

1. Bed Surface

Surface of a stone perpendicular to the line of pressure.

2. String Course

A horizontal course of masonry continuously projecting from the face of the wall.

3. Corbel

A stone embedded in a wall to support a structural member.

4. Cornice

A moulded projection of masonry on the top of a wall.

5. Through Stone

Stone extending throughout the thickness of the wall.

6. Hearting

A filled-up core of a rubble wall.

7. Jam

A masonry portion forming the side of an opening.