4
ii.
Tracks are face mounted to the left and the right of the opening
6.
Determine what material you will be fastening the unit to
a.
Different types of fasteners may be necessary depending what material the unit is being fastened to
b.
When fastening to a steel (or other metal) structure please take note of where the welds are that
connect the posts to the header as this will affect where the housing is mounted
7.
Determine the dimensions of the unit by using the 3 point measuring system *a laser measuring tool is useful
a.
Make sure the opening is square
i.
Make note of any variances
i.
Some variances can be account for and some cannot
b.
For the housing width measure in between the posts (in the jamb) at the top, middle and at the bottom
of the opening
i.
For the finished width of an IUH install, deduct 3/8” from the narrowest of those 3
measurements
ii.
For the finished width of an OAH install, add 5” to the widest of those 3 measurements
c.
For the unit height measure from the ground, or lowest point, to the top underneath the header on the
extreme left side, in the middle and on the extreme right side
i.
For the finished height of an IUH install, take the tallest measurement
ii.
For the finished height of an OAH install, add the height of the housing (5 ½” or 7”) plus the
height of the slide bar (2 ½”) plus the height of the bottom seal (1 ½”) to the tallest
measurement
iii.
There should be a minimum of 5 ½” or 7” of header space (depending on housing size) to mount
the housing to
i.
If there is not enough space on the header to accommodate the height of the housing,
the slide bar and the bottom seal there may be some parts (either the bottom seal
and/or the slide bar) and the customer should be made aware of this as those parts may
be visible from the backside of the opening. You can use a tape measure to measure the
header to see how much space there is to accommodate the housing, slide bar and
bottom seal
d.
If the left or the right side is longer than the other (for a slope in a patio for example) the 1 ½” brush pile
bottom seal will accommodate a 1 ½” bias. If the slope is greater than 1 ½”, up to a 2” bias can be built
in to the mesh to accommodate a total difference of up to 3 ½” between the extreme left and the
extreme right side of the unit
