Also known as the side rebate. The distance between coordinating width and garage wall / coordinating height and ceiling.
Coordinating width (BRB):
The width of the garage opening, measured from edge of wall to edge of wall. The BRB is a key order size.
Coordinating height (BRH):
The height of the garage opening, measured from the lower edge of the header to the upper edge of the finished floor (OFF). The second key order size.
Many up-and-over garage doors feature a rebate profile in the ground to stop the door leaf. The depth of insertion into the ground is known as the floor recess. The ceiling and clear opening heights are marginally reduced if the garage has a floor recess.
Is the space required to install the garage door, measured from the rear edge of the wall opening to the end of the tracks.
Clear passage height:
The actual passage height when the garage door is open. The clear passage height of a sectional garage door is equivalent to the full coordinating height if operated electrically, or reduced by 50 mm if operated manually.
The distance between upper edge of garage opening and ceiling.