Attaching Base Rails to Footings:
The previously assembled
bearing block and
vertical post assembly
from step 3 are inserted
into the sigma posts with
the short vertical posts
serving as the front and
the longer vertical posts
as the rear legs of the
array.
The posts are aligned on
site in accordance with
the tilt angle of the rack;
a minimum lapped joint
length of 8 inches is needed for attachment.
The base rails (ST-AK
182-120) are fastened to
the bearing blocks with
4 T-bolts assemblies
attached by sliding head
of the T-bolts into the two
slots on to the bottom
of the base rails (ST-AK
182-120)on the eastwest
axis.
See Figure 5.1
& 5.2
The T-Bolts must be
turned 45° clockwise
until they cannot be turned
any further.
See Figure 5.2
A line on the bottom of the
T-bolts shows proper alignment.
Line must be perpendicular to the
rail. (Torque Hex nuts: 6 to 8 ft.
lbs.)
See Figure 5.3
To line up several system rails with one another, slide the splice halfway onto
the assembled system rail.
Next, slide the other
system rail onto the splice
and push rails together
until the rivet on the splice
stops the movement.
½” gap or separation
between rails is required
for thermal expansion.
See Figures in 6.1,
6.2 & 6.3
After the frame is complete the
vertical post must be bolted to
the sigma post with the supplied
M10-120 mm hardware. The
vertical posts can be moved
vertically to achieve the required
height and tilt angle of the
array. When the correct angle
is achieved a cordless drill with
a 7/16 bit must be used to drill
through the existing holes in
the sigma post and through the
aluminum vertical post before
the hardware can be installed.
Again, the vertical post must
contact the sigma post for a
minimum of 8 in. (200 mm).
(Torque Hardware: 6 to 8 ft. lbs.)
See Figures: 7.1, 7.2 & 7.3
Landscape Mode Framed PV Modules
ground-Mount application
Subject
to
technical
changes
Copyright
©
2009
HatiCon
Solar,
LLC
Page
3
of
9
Attaching
Base
Rails
to
Footings:
The
previously
assembled
bearing
block
and
vertical
post
assembly
from
step
3
are
inserted
into
the
sigma
posts
with
the
short
vertical
posts
serving
as
the
front
and
the
longer
vertical
posts
as
the
rear
legs
of
the
array.
The
posts
are
aligned
on
site
in
accordance
with
the
tilt
angle
of
the
rack;
a
minimum
lapped
joint
length
of
8
inches
is
needed
for
attachment.
The
base
rails
(ST
‐
AK
182
‐
120)
are
fastened
to
the
bearing
blocks
with
4
T
‐
bolts
assemblies
attached
by
sliding
head
of
the
T
‐
bolts
into
the
two
slots
on
to
the
bottom
of
the
base
rails
(ST
‐
AK
182
‐
120)on
the
east
‐
west
axis.
See
Figure
5.1
&
5.2
The
T
‐
Bolts
must
be
turned
45°
clockwise
until
they
cannot
be
turned
any
further.
See
Figure
5.2
A
line
on
the
bottom
of
the
T
‐
bolts
shows
proper
alignment.
Line
must
be
perpendicular
to
the
rail.
(
Torque
Hex
nuts:
6
to
8
ft.
lbs.)
See
Figure
5.3
4.1
4.2
5.3
5.1
5.2
12
in.
Minimum
12 in. Minimum
Fig. 4.1
Fig. 4.2
Subject
to
technical
changes
Copyright
©
2009
HatiCon
Solar,
LLC
Page
3
of
9
Attaching
Base
Rails
to
Footings:
The
previously
assembled
bearing
block
and
vertical
post
assembly
from
step
3
are
inserted
into
the
sigma
posts
with
the
short
vertical
posts
serving
as
the
front
and
the
longer
vertical
posts
as
the
rear
legs
of
the
array.
The
posts
are
aligned
on
site
in
accordance
with
the
tilt
angle
of
the
rack;
a
minimum
lapped
joint
length
of
8
inches
is
needed
for
attachment.
The
base
rails
(ST
‐
AK
182
‐
120)
are
fastened
to
the
bearing
blocks
with
4
T
‐
bolts
assemblies
attached
by
sliding
head
of
the
T
‐
bolts
into
the
two
slots
on
to
the
bottom
of
the
base
rails
(ST
‐
AK
182
‐
120)on
the
east
‐
west
axis.
See
Figure
5.1
&
5.2
The
T
‐
Bolts
must
be
turned
45°
clockwise
until
they
cannot
be
turned
any
further.
See
Figure
5.2
A
line
on
the
bottom
of
the
T
‐
bolts
shows
proper
alignment.
Line
must
be
perpendicular
to
the
rail.
(
Torque
Hex
nuts:
6
to
8
ft.
lbs.)
See
Figure
5.3
4.1
4.2
5.3
5.1
5.2
12
in.
Minimum
Subject
to
technical
changes
Copyright
©
2009
HatiCon
Solar,
LLC
Page
3
of
9
Attaching
Base
Rails
to
Footings:
The
previously
assembled
bearing
block
and
vertical
post
assembly
from
step
3
are
inserted
into
the
sigma
posts
with
the
short
vertical
posts
serving
as
the
front
and
the
longer
vertical
posts
as
the
rear
legs
of
the
array.
The
posts
are
aligned
on
site
in
accordance
with
the
tilt
angle
of
the
rack;
a
minimum
lapped
joint
length
of
8
inches
is
needed
for
attachment.
The
base
rails
(ST
‐
AK
182
‐
120)
are
fastened
to
the
bearing
blocks
with
4
T
‐
bolts
assemblies
attached
by
sliding
head
of
the
T
‐
bolts
into
the
two
slots
on
to
the
bottom
of
the
base
rails
(ST
‐
AK
182
‐
120)on
the
east
‐
west
axis.
See
Figure
5.1
&
5.2
The
T
‐
Bolts
must
be
turned
45°
clockwise
until
they
cannot
be
turned
any
further.
See
Figure
5.2
A
line
on
the
bottom
of
the
T
‐
bolts
shows
proper
alignment.
Line
must
be
perpendicular
to
the
rail.
(
Torque
Hex
nuts:
6
to
8
ft.
lbs.)
See
Figure
5.3
4.1
4.2
5.3
5.1
5.2
12
in.
Minimum
Fig. 5.1
Fig. 5.2
Fig. 5.3
Subject
to
technical
changes
Copyright
©
2009
HatiCon
Solar,
LLC
Page
4
of
9
To
line
up
several
system
rails
with
one
another,
slide
the
splice
halfway
onto
the
assembled
system
rail.
Next,
slide
the
other
system
rail
onto
the
splice
and
push
rails
together
until
the
rivet
on
the
splice
stops
the
movement.
½”
gap
or
separation
between
rails
is
required
for
thermal
expansion.
See
Figures
in
6.1,
6.2
&
6.3
Note:
Do not attempt to through bolt any splices.
The splice was designed to allow the aluminum rails
to expand and contract under thermal conditions.
After
the
frame
is
complete
the
vertical
post
must
be
bolted
to
the
sigma
post
with
the
supplied
M10
‐
120
mm
hardware.
The
vertical
posts
can
be
moved
vertically
to
achieve
the
required
height
and
tilt
angle
of
the
array.
When
the
correct
angle
is
achieved
a
cordless
drill
with
a
7/16
bit
must
be
used
to
drill
through
the
existing
holes
in
the
sigma
post
and
through
the
aluminum
vertical
post
before
the
hardware
can
be
installed.
Again,
the
vertical
post
must
contact
the
sigma
post
for
a
minimum
of
8
in.
(200
mm).
(Torque
Hardware:
6
to
8
ft.
lbs.)
See
Figures:
7.1,
7.2
&
7.3
6.2
7.2
Note:
Do not attempt to through-bolt any splices. The splice was
designed to allow the aluminum rails to expand and contract
under thermal conditions.
Fig. 6.1
Fig. 6.2
Fig. 6.3
Subject
to
technical
changes
Copyright
©
2009
HatiCon
Solar,
LLC
Page
4
of
9
To
line
up
several
system
rails
with
one
another,
slide
the
splice
halfway
onto
the
assembled
system
rail.
Next,
slide
the
other
system
rail
onto
the
splice
and
push
rails
together
until
the
rivet
on
the
splice
stops
the
movement.
½”
gap
or
separation
between
rails
is
required
for
thermal
expansion.
See
Figures
in
6.1,
6.2
&
6.3
Note:
Do not attempt to through bolt any splices.
The splice was designed to allow the aluminum rails
to expand and contract under thermal conditions.
After
the
frame
is
complete
the
vertical
post
must
be
bolted
to
the
sigma
post
with
the
supplied
M10
‐
120
mm
hardware.
The
vertical
posts
can
be
moved
vertically
to
achieve
the
required
height
and
tilt
angle
of
the
array.
When
the
correct
angle
is
achieved
a
cordless
drill
with
a
7/16
bit
must
be
used
to
drill
through
the
existing
holes
in
the
sigma
post
and
through
the
aluminum
vertical
post
before
the
hardware
can
be
installed.
Again,
the
vertical
post
must
contact
the
sigma
post
for
a
minimum
of
8
in.
(200
mm).
(Torque
Hardware:
6
to
8
ft.
lbs.)
See
Figures:
7.1,
7.2
&
7.3
6.2
7.2
Fig. 7.1
Fig. 7.2
Fig. 7.3
Assembly Instructions
16
Solar
Mounting Sytem
