The IronRidge Ground Mount System combines the strength of XR1000
rails with locally-sourced steel pipes or mechanical tubing to
create a cost-effective structure capable of handling any site of
Installation is simple with only a few structural components and
no drilling, welding, or heavy machinery required. The System
works with a variety of foundation options, including concrete
piers and driven piles, and can support up to 5 modules per
See the 360 View
The strongest rail in the industry makes it simple and secure to
assemble columns of three to five modules.
Watch Test Video
Universal Fastening Object
Accommodating a wide range of module frame heights (30-48 mm)
each UFO bonds with the module frame and the rail to form a
parallel bonding path that is repeated throughout the array
Watch Product Video
Caps & Connectors
Top Caps and Rail Connectors are the only components needed to
attach XR Rails to cross-pipes and vertical piers.
Pipes & Mechanical Tubing
Locally-sourced 2” or 3” schedule 40 pipe and mechanical tubing
allows you to save on freight, while still spanning as high as
18’ between vertical piers.
We offer Ground Mount training on a regular basis. Find an upcoming
Find documentation and certifications for
the Ground Mount System.
Frequently Asked Questions about the IronRidge Ground Mount System.
When should I use 3” versus 2” Schedule 40 steel pipe for my sub-structural material?
2” Schedule 40 steel pipe is generally used for smaller
arrays, such as residential applications, because it’s
lightweight and easy to handle. 3” Schedule 40 steel
pipe is most useful for larger arrays, where the longer
E-W span helps reduce the number of concrete
foundations. But, 3” Schedule 40 steel pipe is also
heavier and sometimes requires heavy machinery for
installation. Before purchasing your pipes, confirm
the specifications with the
Ground Mount Engineering Design Guide.
How should I splice my Schedule 40 steel cross pipe?
Threaded couplers are the most common method for
splicing Schedule 40 steel pipe. This requires that
you order “threaded pipe” from the manufacturer or
that a threading tool be available onsite. Welding
the pipes directly to one another or using welded
couplers are also acceptable options. Keep in mind
that splices should not fall within the middle third
of the span or on the end span (cantilever) of the
My soil is very rocky. Do you have any foundation designs aside from concrete footings?
IronRidge provides standard foundation sizes for
various soil classes. However, some soils may be
extremely difficult to dig into, such as granite or
rocky soils. Solutions for these soil types include
epoxying rebar into the granite and pouring the
foundations above the ground, connecting the piers
with low depth grade beams, or casting the piers into
above ground ballast blocks. Consult an engineer for
structural review if using a foundation design other
than those described in the IronRidge Certification
What determines my North to South pier spacing?
North to South pier dimensions are static measurements
in our Ground Mount design that are either 7.5’ or 9’,
depending on the number of modules per column. Refer
to the assembly drawing found at the bottom of the
IronRidge Certification Letter for dimension details.
The certification letters can be found
in the System Support
section under the Ground Mount tab on the IronRidge website.
What design constraints should I be aware of when building an array on an East to West slope?
The maximum “above ground length” for the southern vertical piers is 2’6”. To prevent exceeding this length on either side of the array, break
the array into segments. This “stepped” array will prevent the East or West side of the array from being too high. If this is not a viable option,
consult an engineer for alternative approaches.
How do I suspend my vertical piers while I pour concrete?
Many installers create a temporary set of “forms” to suspend the East to West cross pipes, with the vertical pipes already attached to them.
This approach allows you to assemble and level your sub-structure at the appropriate height, then pour all of the concrete at once. Always
refer to the
Ground Mount Installation Manual
prior to assembly.
How do I calculate row spacing to avoid shading?
This question depends on what is considered an acceptable amount of annual “shade loss” (system output lost to inter-row shading). If your goal is zero shade
loss, visit the first the NOAA Solar Calculator (http://www.esrl.noaa.gov/gmd/grad/solcalc/) to find the minimum solar altitude angle (El) on December 21st at 10 A.M.,
by inputting the coordinates of the project area. Use the following formula to find distance (D) between arrays to avoid shading: D’=h/tan(El). Height (h), is the
difference between the rear edge of the first array and leading edge of the second array.