Installation Guide
RDQCI5283 Rev. 0 Page 5 Cered 06/01/2016
If a continuous unit centerline does not exist from the
original measuring process, it will be necessary to create
one. Referencing the Measuring Guide included with this
unit, lightly mark a continuous unit centerline on the
threshold.
Next, mark a continuous unit centerline up each wall,
starting where the threshold centerline meets the wall.
Use a level to ensure the wall centerline is plumb and
straight. The wall centerlines should be a minimum of the
unit height from the threshold.
Note: Centerline (CL) is a term used to describe the cen-
ter or mid-point of the unit. The position of the unit cen-
terline can be located anywhere in the width of the
threshold, as long as adequate structure exists beneath
the centerline for fastening and the outer edges of the
unit will not overhang the threshold. The most common
unit centerline position is the middle of the threshold.
Note: It is extremely important the unit cen-
terline be continuous and straight to ensure
proper installation.
**IMPORTANT**
Keep both marks in-line to ensure
Use a level to check the threshold for out of level conditions if the original
measured conditions are not available. If no conditions exist, measure up each
wall centerline a distance of Unit Height from the threshold, and clearly mark
each location.
If out of level conditions exist; measure up the “high” side wall centerline a dis-
tance of Unit Height from the threshold and clearly mark this location. For the
wall centerline distance on the “low” side of the threshold, use a level to deter-
mine the threshold out of level distance and add this value to Unit Height.
Measure this summed distance up the “low” side wall centerline from the thresh-
old and clearly mark this location.
(See illustration for example.)
RDQCI5283
Page 5 of 13 Date Certified: 06/16/2016