Planning glossary
Centerline
A reference line through the middle of a wall, route, or element, distinct from either finished face.
Example
A 6-inch-thick wall drawn from its centerline has faces 3 inches to either side before finishes.
Related concepts
Finish face
The visible completed surface used for a dimension, distinct from framing face or centerline.
Read definitionRough opening
The framed opening prepared to receive a door, window, or other component, based on product instructions and installation requirements.
Read definitionPerimeter
The total measured length around a closed boundary under a stated face or centerline convention.
Read definitionUse the term in context
Definition boundaryThis planning definition is not a substitute for the definition in an adopted code, standard, contract, manufacturer instruction, or professional document. Confirm the controlling meaning for the project.