Series 4000 Side-of-Pole PV Module Rack
(Formerly U-05)
Installation Sheet 406.2
© 2004 by UniRac, Inc.
All rights reserved.
Pub 040623-3ii
June 2004
UniRac welcomes corrections, clarifi cations, or other input concerning
this manual. Please write to
Thank you for purchasing a UniRac. Please review this manual completely
before proceeding.
The installer is solely re spon si ble for:
• Complying with all applicable local or national building codes,
including any that may supercede this manual;
• Ensuring that UniRac and other products are appropriate for the
particular installations and are designed for the installation envi-
ronment;
• Using only UniRac parts and installer-supplied parts as specifi ed by
UniRac (substitution of parts will void the warranty);
• Ensuring safe installation of all electrical aspects of the PV array.
Parts List
Part Qty.
Channel 1
Bracket, left-hand 1
Bracket, right-hand 1
Rail 2
Mounting pole guidelines
The installer is solely responsible for use of the in for ma tion
below. These are general guide lines for normal in stal la tions.
The following variances can affect your installation:
• The required diameter and depth of the hole are
dependent on soil type, which varies by locale. An
in stal la tion in loose, sandy soil will require larger,
deeper holes and, there fore, more concrete than an
in stal la tion in soil of average density.
• The depth and width of the hole should also be in-
creased in areas subject to winds in excess of 90 mph,
particularly if the location of the mount ing pole is
open and unprotected.
• Poles taller than 6 feet above ground require that the
depth of the hole be increased.
If in doubt, consult a professional civil engineer who is familiar
with local soil conditions and wind load re quire ments.
1. Dig a hole 8 to 12 inches in diameter and 36 to 40
inches deep. Fill the bottom with 4 inches of gravel.
2. Stand the pipe in the hole. Brace the pole so that it
is plumb. Pour con crete around the pipe, fi lling the
hole to ground level. Add an inch or two of extra
concrete above the hole. Use a trowel to slope the
concrete around the pole.
3. Allow the concrete to set up for at least 24 hours
before installing your UniRac.
Wrench Recommended
Part Qty. size torque (ft-lbs)
Hex-head bolt,
¼˝
4
7
/
16
˝
15
Hex-head bolt,
5
/
16
˝
8
½˝
20
U-bolt,
3
/
8
˝
1
Flange nut,
¼˝
4
7
/
16
˝
15
Flange nut,
5
/
16
˝
8
½˝
20
Flange nut,
3
/
8
˝
2
9
/
16
˝
30
Before assembly
This rack is intended for side mounting on a 2-inch Schedule 40 or Schedule
80 steel pole (2
3
/
8
˝
O.D.), which is not included with the rack. UniRac supplies
hardware that fi ts a 2-inch pole. U-bolts for poles up to 4 inches are available at
extra cost.
Use the Parts List to verify that all parts are present.
If desired, excess rail length can be cut off. Cut between rail slots—never
through a slot.
Caution
Stainless steel hardware can seize up, a process
called galling. To sig nifi cant ly reduce the like li hood
of galling, apply a small drop of anti-seize lubricant
to the threads of all bolts before installation.
Anti-seize lubricants are readily available in auto
parts and hardware stores. In their absence, any
lubricant will reduce chances of galling.
