Installation Guide

QCI0286 5 XX/XX/XXXX
Note: It is critical that the
threshold U-Channel is
centered on the center-
line.
1 If a continuous unit centerline does not exist
from the original measuring process, it will be
necessary to create one. Lightly mark a continu-
ous unit centerline on the threshold. Next, mark a
continuous unit centerline on 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.
This unit requires the use of a Door Guide [11]
that mounts 1 1/2” away from the inside of the
horizontal u-channel. Be sure that the curb is
wide enough before drawing centerline for the u-
channel. See example.
Note: Centerline (CL) is a term used to describe the center or mid-point of the unit.
The position of the unit centerline can be located anywhere within 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.
2 Verify that the U-channels is cut to the appropriate size. This piece of U-channel will
be equal to the opening width. Next drill three 3/16” diameter holes in the center of U-
channel (centerline groove provided for convenience), two holes approximately 2-1/2”
from each end and one in the middle. Place the U-channel in its correct position with the
u-channel centerline over the threshold centerline as marked in step one.
With a pencil carefully mark each hole position on the threshold centerline. Remove the
u-channel and drill a 3/16” diameter hole, approximately 1” deep, directly on the thresh-
old centerline at the marked
locations.
3” Minimum Curb
1 1/2”