The absolute measurement of empty space between two physical boundaries. Trades use this dimension to determine exactly how much room is available for installing fixtures, framing openings, or moving equipment. It ignores the thickness of the walls or framing members themselves, focusing entirely on the usable void.
Heard on the job
The rough opening is framed at thirty-two inches, but after drywall we only have thirty inches in the clear.
Also heard as
- clear opening
- clearance