Abbreviations used for Architectural Castings:
| A | Assembly of more than one part required |
|---|---|
| BD | Base diameter (outside diameter where capital joins column) |
| BP | Base Projection (thickness where capital joins pilaster) |
| BW | Base Width (outside width where capital joins pilaster) |
| D | Drop, maximum top to bottom when installed |
| H | Height |
| IR | Inside Radius |
| L | Length of casting supplied |
| OC | On Center of design repeat (or design repeat) |
| P | Projection, maximum front to back when installed |
| W | Width at widest point of design |
| WP | Wood/Plaster assembly |