APA TITAN DUO User manual

Updated: November 2022
INSTALLATION MANUAL
TM
4-RAIL DESIGN

PAGE 2 - INSTALLATION MANUAL
TITAN DUO 4-RAIL
TABLE OF CONTENTS
PAGE
2 TABLE OF CONTENTS
3 PARTS LIST
4 SITE PREPARATION, UTILITIES, SURVEYING, TOOLS
5 REVIEW & INSTALLATION PREPARATION, UNEVEN GROUND, MEASURING
6
7
FOUNDATION INSTALLATION, ALTERNATE FOUNDATION INSTALLATION, POST INSTALLATION
8
POST INSTALLATION (CONTINUED)
9
ROLL BRACKET-TO-N/S CHORD, KNEE BRACE & N/S CHORD-TO-FRONT POST, N/S CHORD-TO-REAR POST
N/S CHORD-TO-REAR POST (CONTINUED), KNEE BRACE-TO-BRACE CLAMP, ADJUSTMENTS
ZEE PURLINS-TO-ROLL BRACKET, ZEE PURLINS-TO-N/S CHORD, ZEE PURLIN-TO-ZEE PURLIN
TRANSVERSE BRACE-TO-ZEE PURLINS
PANEL INSTALLATION
10
11
12
13 PANEL INSTALLATION (CONTINUED)
PRO-TIPS
O&M REQUIREMENTS
14
16
CABLE BRACE-TO-POST
15
(SPLICE)
ZEE PURLIN STAGING

1
2
3
4
5
6
7
8
15 16 17
9 10 11 12 13
14
STRUCTURAL MEMBERS
[1] ROLL BRACKET ASSEMBLY
2X 3/8-16X1.0" PUSH-IN STUD
1X 1/2-13X1.0" PUSH-IN STUD
[2] N/S CHORD
[3] E/W ZEE PURLIN
[4] KNEE BRACE
[5] TRANSVERSE BRACE
[6] FOUNDATION (SCREW)
[7] POST
[8] CABLE BRACE
HARDWARE
[9] 3/8-16 SERRATED FLANGE NUT
[10] 1/2-13 SERRATED FLANGE NUT
[11] 1/2-13X1.0" SERRATED FLANGE BOLT
[12] 1/2-13X3.5" SERRATED FLANGE BOLT
[13] END CLAMP ASSEMBLY
M8X1.25 25MM HEX BOLT
M8 LOCK WASHER
END CLAMP (SIZED FOR PANEL)
M8X1.25 SERRATED FLANGE NUT
[14] MIDCLAMP ASSEMBLY
M8X1.25 70MM HEX BOLT
M8 LOCK WASHER
MID CLAMP
SPRING
GROUNDING SPACER
M8X1.25 SERRATED FLANGE NUT
[15] KNEE BRACE CLAMP
[16] CABLE CLAMP ASSEMBLY
CABLE CLAMP
5/16 HEX NUT
5/16 CARRIAGE BOLT
[17] M16X2.0 30MM HEX BOLT (GROUND SCREW
SET BOLT)
[18] TRANSVERSE BRACE STRAP
PARTS LIST
18
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TITAN DUO 4-RAIL

PAGE 4 - INSTALLATION MANUAL
TITAN DUO 4-RAIL
NOTE
Foundation locations should be surveyed by a profes-
sional surveyor, who can stake out row locations to the
highest precision.
TOOLS
The M16 ground screw set bolts require a minimum 400
ft/lb impact gun. 1/2” hardware requires a minimum 300
ft/lb impact gun to have enough torque to tighten fully.
3/8” hardware requires a standard Dewalt impact driver
or similar. Use a 15” spud handled tool for alignment of
E/W rail. For module installation, use a standard impact
gun with a maximum of 154 ft/lb torque.
SITE PREPARATION
Site preparation should be conducted prior to construc-
tion. This will typically involve grubbing, rock and debris
removal, and any other preparation that will facilitate
swift and unhindered installation.
UTILITIES
All utilities should be marked before any construction
begins.
SURVEYING
To ensure that the solar array is installed according to
customer plans, the site should be surveyed accord-
ing to the scope of work. This includes the North and
South foundation locations for the TITAN Duo system.
For projects with signicant topography, survey points
should be checked with a tape measure. Typically, the
TITAN Duo system requires a 100% survey.
CONSTRUCTION 101
All structures, regardless of how complex, are built one
step at a time. Each new step builds on the previous. In
order for the nal structure to be complete, it is best
to ensure that each step is done correctly. It is far easi-
er, faster, and cheaper to take your time to ensure each
step is done correctly before moving on. There is no rem-
edy for an error other than a correction. Time and eort
will be put forth eventually to redo steps, reconstruct,
and make adjustments, but far less eort is required to
correct mistakes as they appear. If errors are xed im-
mediately, each subsequent step will begin correct and
projects will run more eciently.
It is recommended to completely install a test row from
beginning-to-end of the row, and from beginning-to-end
of all steps (from layout, to panel installation, and ad-
justments). This will help you understand not only how
to install the product, but understand how tolerances
stack up, how mistakes in one step cause errors in oth-
er steps, and how to make the adjustments required to
keep everything in tolerance and looking good.

EQUAL
Measuring diagonals
100"
200"
300"
400"
REVIEW & INSTALLATION PREPARATION
After site preparation has been completed and the site
surveying is done, the foundations are ready to be in-
stalled. It is the responsibility of the site lead to review
and understand the site foundation layout, surround-
ings, installation procedures, and to manage the instal-
lation to completion. Each project has dierent require-
ments (embedment depths, spans, etc.) that need to be
met according to site testing and data gathered prior to
the start of the project. The site lead must verify that
the foundations on site match the order and project re-
quirements.
Dimensions in the East-West direction will change de-
pending on row length, row location, and location with-
in the row. Closely follow the construction plans and if
there are any questions or discrepancies, bring them up
to the site lead or project manager before installing any
foundations.
UNEVEN GROUND
For sites with ungraded or rolling topography, it is im-
portant to ensure that the foundations are set to the
correct depths. In cases where post locations can not be
marked on the ground (uneven terrain), it is advised to
check the survey points with a steel tape measure.
MEASURING
All measurements in the East-West direction must be
made with a steel tape measure, and made from the
start of the row, not foundation-to-foundation. For ex-
ample, if the plans were to call for the rst 4 spans to
be 100” each, the tape should be staked to the ground,
and the ground should be marked at 0”, 100”, 200”, 300”,
400”.
Measuring from foundation-to-foundation allows tol-
erances to stack up. In this case, a 2” tolerance would
have stacked up to be 8” o by only the fth foundation,
and will cause major installation issues further down the
road. If necessary, tape measures should be marked pri-
or to use or prints should be marked up to indicate addi-
tive measurements (ie. 0”, 8’4”, 16’8”, 25’0”, 33’4”).
For TITAN Duo systems, the North and South points must
remain in line with each other (one should not “chase”
the other). Ensure the points are square every few sets
by measuring diagonals. If marks are found to be out of
square, make adjustments to correct.
PAGE 5 - INSTALLATION MANUAL
TITAN DUO 4-RAIL
PRO TIP
1

NOTE
Check all survey points before pilot drilling.
FOUNDATION INSTALLATION
1. Preinstall the set bolts to ensure the integrity of the
welded nut.
2. Drive the foundation with a single point, starting at
one end of the site. The string line method is best for
ensuring a straight line and a perfect plane of the array.
Foundations are typically installed 6” above grade.
3. Ensure the foundation is held plumb and in the proper
location using a level.
4. Drive the foundation to the correct depth as indicated
by the construction documents.
5. Install all remaining foundations, using a string line
as a guide for placement and height if necessary. Use a
tape measure as described in the preparation process.
ALTERNATE FOUNDATION INSTALLATION
For sites with medium-to-heavy rock or bedrock, holes
may need to be piloted and backlled prior to founda-
tion install. When required, perform the following steps
prior to the steps above.
1. With an auger or rock drill, drill a pilot hole to correct
depth and diameter.
2. Fill the hole with stone as indicated by APA. The
amount of stone varies based on the site’s soil type.
POST INSTALLATION
1. Insert the short post at the rst point on the south set
of foundations.
2. Measuring from the ground to the top of the post,
ensure the post is at the correct height according to the
construction plans. Also ensure the upper bolt holes are
rotated to align in the East-West direction. Temporari-
ly secure the post in place with a quick clamp or similar
tool.
3. Repeat further down the south side of the row with
another foundation to create the next attachment point
for the string line, once again measuring and ensuring
plumbness. When topography is present, additional
transition posts must be installed at transition points so
that the string line can ow through hills and valleys at a
moderate rate. Although the racking will follow terrain,
it has limitations. Therefore, ensuring smooth ow will
greatly aid the installation process.
PRO TIP
5
PRO TIP
6
PRO TIP
4
PRO TIP
2
PRO TIP
3
NORTH
EAST
1”
1”
1” ±1”
Rotate so holes
align east/west
±2° Plumb
1”
PAGE 6 - INSTALLATION MANUAL
TITAN DUO 4-RAIL

PRO TIP
7
PAGE 7 - INSTALLATION MANUAL
TITAN DUO 4-RAIL
POST INSTALLATION (CONTINUED)
4. Continue to the end of the row as required to set a
string line.
5. Run a string line between all foundations at the same
height. For consistency, string line should run along the
same side of the foundation for the entirety of the site
(for example, always wrap counterclockwise, then install
new foundations on the south side of the string). This
will help prevent zigzagging.
6. Ensure the heights of all posts are correct and ow
with the terrain in the method indicated in the construc-
tion plans.
7. Secure the transition posts at the foundations with
three (3) bolts and remove the temporary clamps.
[6] SCREW FOUNDATION
[7] POST
[17] M16X2.0 30MM HEX BOLT (GROUND SCREW
SET BOLT)
8. Once heights are veried correct a nd r otation is
correct, bolts can be tightened. Every post should be
checked to ensure the bolts are fully seated.
9. Once the south side posts are installed, set the north
side posts by adjusting the height to the designed tilt
angle per foundation set (check the build plans for the
correct tilt angle). Use a steel guide and angle nder to
determine the tilt. Repeat the string method for the
north side posts.
Top view of post and fully tightened bolts
17
6
7

ROLL BRACKET-TO-N/S CHORD
1. Along the at side of the N/S chord, with the slots
on the N/S chord pointing up, attach a roll bracket as-
sembly.
2. Match the two (2) studs in the roll bracket assembly in
the correct hole set at the front of the part. Refer to
site build plans to determine which set to use. Correct
usage is based on specications provided by the module
manufacturer, and will remain consistent on each proj-
ect (assuming only one module model is used).
3. Secure both studs, each with a nut.
4. Repeat steps for all remaining roll brackets. There are
four (4) roll brackets per N/S chord.
[2] N/S CHORD
[1] ROLL BRACKET ASSEMBLY
[9] 3/8-16 SERRATED FLANGE NUT
KNEE BRACE & N/S CHORD-TO-FRONT POST
1. Refer to the construction drawings for the correct
nominal attachment holes/slots in both the knee brace
and the N/S chord. Additional holes/slots can be used
for adjustments.
2. Ensure the at side of the N/S chord and knee brace
are against the post. The N/S chord should have the
ange with the slots pointing upwards, and be placed
on the West of the post. The knee brace should be on
the East side of the post.
3. Attach the N/S chord and the knee brace to the front
post (south) at the same time.
4. Secure with a bolt and nut through the single hole in
the post. Fasten loosely.
[2] N/S CHORD
[4] KNEE BRACE
[7] POST
[10] 1/2-13 SERRATED FLANGE NUT
[12] 1/2-13X3.5” SERRATED FLANGE BOLT
N/S CHORD-TO-REAR POST
1. Slide the brace clamp over the rear post prior to at-
taching the N/S chord or stretch the clamp apart, t
it around the post, and squeeze it back to its original
shape. Install the cable clamps as required.
NOTE
Images are for reference only. Ideal hole/slot connec-
tion points may vary.
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1
2
2
7
4
10
12
PRO TIP
8

2
7
10
12
10
4
11
15
PAGE 9 - INSTALLATION MANUAL
TITAN DUO 4-RAIL
N/S CHORD-TO-REAR POST (CONTINUED)
2. Ensure the long, at side of the clamp is facing the
East so it can mate ush with the knee brace, as shown.
3. Conrm that the N/S chord is on the West side of
the post, with the at side against the post, and that
the smaller ange with the slots pointing upwards, as
shown.
4. Secure with a bolt and a nut through the single hole.
Fasten loosely.
KNEE BRACE-TO-BRACE CLAMP
1. Secure through the nominal hole as indicated in the
construction documentation with a bolt and a nut. Fas-
ten loosely.
[11] 1/2-13X1.0” SERRATED FLANGE BOLT
[15] KNEE BRACE CLAMP
ADJUSTMENTS
1. Adjust the N/S chord to align, ensuring that the front
of the row is straight and follows the terrain. Fully tight-
en all fasteners once adjustments have been made.
ZEE PURLIN STAGING
Stage the zee purlins by setting them on the N/S chord
and resting above the roll brackets.
1. Refer to the build plans to ensure the correct zee pur-
lins are in the correct position. There are dierences in
either length or hole patten in the zee purlins, so ensure
the correct part number is used. There typically are mul-
tiple zee purlins of the same length, with only slightly
dierent hole patterns.
2. Ensure the zee purlins are in the correct orientation,
as shown, with the slotted side facing up and towards
the front of the rack.
Example zee purlin layout

PAGE 10 - INSTALLATION MANUAL
TITAN DUO 4-RAIL
5
10
11
318
NOTE
Transverse braces are not for squaring the structure,
but to minimize transverse movement (racking) and
keep the rack square. If the rack is not square to be-
gin with, the transverse braces will not t or function
correctly. If dierent holes than outlined here must be
used, the rack is not square and further installation of
the panels will not be correct. Ensure transverse braces
are installed prior to panels installation.
TRANSVERSE BRACE-TO-ZEE PURLINS
Note: at no point is drilling of the transverse brace per-
mitted. If the holes do not align, it indicates an error in
a previous step.
1. Beginning at the lowest zee purlin (#1), loosely fasten
the transverse brace to the purlin at the location indicat-
ed in the construction plans.
2. Loosely attach the two (2) squaring straps at the
transverse brace and zee purlin locations as indicated in
the construction plans.
3. Once all four connections are in place, securely torque
all fasteners as indicated in the construction plans. This
ensures that the transverse brace is perpendicular to
the lowest zee purlin.
[3] E/W ZEE PURLIN
[5] TRANSVERSE BRACE
[11] 1/2X1.0” SERRATED FLANGE BOLT
[10] 1/2-13 SERRATED FLANGE NUT
[18] TRANSVERSE BRACE STRAP
4. Continue to the next lowest zee purlin (#2), aligning
the loosely staged zee purlin with the corresponding
hole in the transverse brace. Once aligned, securely fas-
ten and torque the connection.
5. Repeat this process for the remaining two (2) zee pur-
lins (#3 & #4), moving up the transverse brace.
6. Once all of the transverse brace to zee purlin connec-
tions have been made, the rst bay should be square to
the end of the row as shown.
7. Repeat this process at all bays requiring transverse
braces according to the construction plans.
#1
#2
#3
#4
Connection Points

ZEE PURLINS TO ROLL BRACKET
1. Ensure the stud goes through both zee purlins.
2. The stud should typically go through the center slot
(4th slot) on both purlins. Occasionally, the other slots
may need to be used to resolve foundation installation
errors.
3. Secure with a nut. Fasten loosely.
4. Repeat at all locations for each N/S chord. There are
four (4) roll brackets and connections required per N/S
chord.
[2] N/S CHORD
[3] E/W ZEE PURLIN
[1] ROLL BRACKET ASSEMBLY
[10] 1/2-13 SERRATED FLANGE NUT
[11] 1/2-13X1.0” SERRATED FLANGE BOLT
ZEE PURLINS-TO-N/S CHORD
1. The zee purlins should already be in the correct loca-
tion and loosely fastened by now.
2. Fasten the zee purlins to the N/S chord with a bolt and
nut. Ensure the bolt is facing down (to keep wire tray
clear). Fasten loosely.
Note: the lower slots are matched to the middle slots, so
there is no choice in slots at this point. See note about
nominal slots in the ZEE PURLIN STAGING step.
3. Repeat at all locations for each N/S chord. There are
four (4) connections required per N/S chord.
ZEE PURLIN-TO-ZEE PURLIN (SPLICE)
1. Splice the zee purlins together once the transverse
braces are installed and the purlins are attached to the
N/S chords.
2. The direction of the overlap (which zee purlin is on
top) is not important, and either order is acceptable.
3. Each splice should have four (4) additional bolts at
each location. Ideally, these should be at the outer most
slots at the center web and on the lower ange of the
zee purlins.
4. If the splice is already connected at the lower ange
with a transverse brace, only the two (2) connections in
the center web are needed. If the N/S chord is located
at either outer most hole, those splice bolts should be
moved inward one (1) set. All splices should have six (6)
connections in total.
1
3
10
11
2
3
11
10
3
PAGE 11 - INSTALLATION MANUAL
TITAN DUO 4-RAIL
PRO TIP
9

PAGE 12 - INSTALLATION MANUAL
TITAN DUO 4-RAIL
PANEL INSTALLATION
1. Beginning at one end, start setting the panels by
squaring the rst panel to the bottom zee purlin. Refer
to the construction documentation to determine the
correct orientation of the panel.
2. Place the top panel after squaring the bottom pan-
el. Make sure the spacing between the top and bottom
panel is correct. Note: use a xture to create the proper
gap, such as a piece of wood and spare clamp from the
site.
3. Place the panels periodically throughout the row,
squaring them to the rack as you go. Once these tran-
sition panels have been placed, run a string across them
to create your leading edge for the row. This is done
to provide the best aesthetics while keeping the panel
placement within specication.
4. Check the construction plans to determine the correct
panel placement. For example, a 4W section will have
four (4) panel sets, then a break with an end clamp. Fol-
lowing this correctly will allow your panels to be placed
in the pre-punched holes on the zee rail.
5. Stage mid clamps and end clamps in the correct loca-
tions based on the build plans.
PRO TIP
10
PRO TIP
11

WARNING
DO NOT stage an entire row of panels. Only stage
enough panels required to properly adjust them left to
right (East to West). DO NOT leave panels unattended
with untightened clamps, as wind may blow them o
and cause damage.
Midclamps may be pre-installed from either side of the long
keyslot
INCORRECT
CORRECT
PANEL INSTALLATION (CONTINUED)
6. Stage panels throughout the row in preparation to be
set to the string line.
7. When starting panels, mid clamps can be placed in any
area of the long keyslot, except for the entry point. Note
that starting in the middle will be the nominal selec-
tion, however terrain and any adjustments made at the
breaks will make the placement vary in the long keyslot.
8. Tighten the clamps square to the panels and ensure
the grounding teeth are coming into contact with the
panel frame.
9. If adjustments are needed, work within the tables on a
given rack (for example, 4W, 7E, 5W) by adjusting place-
ment in the long keyslot and gaps between the resets
on the continuous rack.
10. Repeat steps down the row, moving transition pan-
els as you reach them if necessary.
PAGE 13 - INSTALLATION MANUAL
TITAN DUO 4-RAIL

PAGE 14 - INSTALLATION MANUAL
TITAN DUO 4-RAIL
7
16
8
16
CABLE BRACE-TO-POST
Depending on the array and project parameters, a set
of posts may get multiple sets of cable braces to limit
movement and reduce fatigue. Refer to the construc-
tion documentation for locations and frequency of ca-
ble bracing.
1. If clamps were not installed prior to installing the N/S
chord (highly recommended), spread the clamp apart,
slide around the post, and re-compress it. Install clamps
on the North and South posts as required.
2. Once clamps are installed, string a cable between the
two clamps (note: there may be multiple lengths of ca-
bles on one job; refer to construction documentation to
use the correct one).
3. Secure with bolts, loosely. Ensure that the bolts are
pointing to the interior of the rack.
4. Position one clamp slightly above the knee brace
clamp and fasten tightly.
5. Slide the opposite clamp as far as possible and fasten
the bolt tightly. Cables should be taut and have no no-
ticeable slack or sag.
6. Repeat for all remaining cables as indicated in the con-
struction documentation.
[7] POST
[8] CABLE BRACE
[16] CABLE CLAMP ASSEMBLY
NOTE
Cable braces are not used to induce static tension, like
trusses of a bridge, but instead only to keep the posts
from spreading or shifting.

[6] When dealing with extreme topography, addition-
al transitions will have to be added to make the rack-
ing ow with the terrain.
[7] Use grip clamps when setting post transitions.
This is the best technique to use so that no improp-
er dimpling is done to the posts if adjustments are
needed. Once desired ow is reached, then tighten
the set bolts.
[8] Use a grip clamp to squeeze and close the clamp
shut while installing the clamp bolt. Connect the
knee brace to the knee brace clamp with a squeeze
vise. This process takes less eort as the clamps are
very rigid.
[9] Use a spud wrench to align keyhole slots while
installing the overlapping zee purlins. Use a spud
wrench/alignment punch to pry onto the stud. At
times, due to topography, the opposite side of the
zee purlin will have to be lifted in the air to properly
seat onto the previously installed zee purlin.
[10] When staging panel clamps, tighten the bot-
tom nut until the spring is slightly compressed. This
will help the panel installer free up one hand. If the
spring is not compressed prior to staging, the clamp
will spin and another installer will have to hold the
panel.
[11] To square the panel, measure the distance from
the edge of the panel to the at part of the zee purlin
on both sides, ensuring equal distance.
PRO TIPS are pieces of advice from installation ex-
perts. They are intended to provide practical solu-
tions to real-world problems that you may encounter.
But before implementing any of the below tips, make
sure to request approval from APA’s Engineering
team, as not all solutions are allowed on every site.
[1] Use a steel tape rather than a berglass tape to
measure distances over the length of the row. Fiber-
glass can stretch over time and aect layout and in-
stallation lengths.
[2] With extreme topography, every foundation must
be marked and the string line must be attached to
every foundation in order to ensure that the racking
will ow at every high and low point.
[3] Install the beginning, middle and end foundations
about half of the way to depth (typically until threads
are not showing). Then attach a string line to these in-
stalled foundations, creating a straight line for the in-
stallation process. This will give the installer a guide
and ensure that the foundations are plumb.
[4] If holes are pre-drilled, they must be lled with
aggregate immediately, ensuring debris or water
doesn’t fall into the holes. If this happens, a void can
be created causing the foundations to possibly sink
in the future.
[5] While it is very dicult to make every post per-
fectly plumb and at the correct height, care should be
taken to keep them within the tolerances specied in
the plans in order to ensure that the system ts and
functions as intended.
PRO TIPS
PAGE 15 - INSTALLATION MANUAL
TITAN DUO 4-RAIL

PAGE 16 - INSTALLATION MANUAL
TITAN DUO 4-RAIL
OPERATION & MAINTENANCE
Regular inspections and proper maintenance are essential to maintain the design life and warranty of the TITAN so-
lar racking system. Solar racking is exposed to many elements from initial construction to seasonal changes and can
even be susceptible to severe weather conditions. The following Operation and Maintenance procedures should be
followed and performed on an annual basis to ensure the warranty for the racking system remains active. The pro-
cedures below highlight the critical points to be examined and maintained for a properly functioning solar racking
system.
BOLTED CONNECTIONS
Bolted connections need to be visually inspected annually to ensure the components are properly joined together.
There are torque marked nuts/bolts at the beginning, middle, and end of each row per the APA QA/QC process. These
marked locations should be visually inspected to conrm no movement of the bolted connections have occurred. If
loose hardware is found, re-tighten to the specications noted in the plan set for the racking system.
SOLAR PANEL CLAMPS
Clamps need to be visually inspected annually to ensure modules are properly secured. If loose clamps are found,
retighten to the specications noted in the plan set for the racking system.
GALVANIZE COATING
The galvanized coating ensures that the steel components are protected from corrosion and that the solar racking
system will last for the entire project life. The solar racking system should be inspected annually for any areas of cor-
rosion or rust. If areas are found, they should be repaired in a timely manner by cleaning the area, then generously
applying cold galvanizing compound.
The cut, slit and sheared edges of the racking system are exposed steel that are expected to show corrosion or rust.
This is normal and should be expected, but does not aect the structural integrity of the system.
Copper should be isolated and cannot touch the galvanized coating, as it will expedite corrosion.
CROSS BRACING CABLE WIRE
If applicable to your project, the bracing needs to be visually inspected on an annual basis to ensure that it has not
become loose. Cables are required to be taut for limiting motion, but do not need to be tensioned.
SYSTEM DAMAGE
The solar racking system should be visually inspected for other types of damage. Examples include damage from
mowing equipment, maintenance equipment, falling trees or branches, storm damage, system lean, soil erosion, etc.
Any components that are damaged or deformed should be replaced as they may be weaker or corrode faster than
intended. Some components may be able to be repaired onsite if replacement is not practical. Contact APA for assis-
tance with replacement parts or instructions on repairing a component.
GENERAL OPERATION
It is important to maintain the solar racking system to ensure the design lifespan.
Keep all vegetation managed and o of the racking system and solar modules.
Check that module cleaner solution, weed killer, or other chemicals used on or around the solar racking system are not
corrosive to galvanized or stainless steels.
Check electrical wiring to ensure it is managed properly and protected.
Take note and log when inspections were performed and if any corrective actions were taken or need to be taken in
the future.