IronRidge Ground Mount Kit – 8 to 40 Panels

A complete IronRidge ground-mount racking kit, sized for your array. IronRidge XR1000 rails sit on a substructure of locally sourced 3" steel pipe. You get a strong, low-cost structure with only a few parts, and no drilling, welding or heavy machinery. Choose 8 to 40 panels in steps of 4, and the kit ships with every IronRidge component the array needs.

Note: steel pipe is not included. This kit includes all the IronRidge racking parts. You buy the 3" Schedule 40 galvanized pipe for the piers and cross pipes locally, along with concrete or ground screws. Local pipe usually costs far less than having it shipped. The exact quantities for each kit size are listed under "Buyer-supplied materials" below.

Why IronRidge

UL 2703 listed for bonding, grounding, mechanical loading and fire classification. Also certified to CSA TIL A-40 (2400 Pa / 50 PSF).
PE certified: pre-stamped engineering letters are available in most states. Designed for the International Building Code and ASCE 7.
Flexible foundations: concrete piers, ground screws, helical or driven piles, or above-ground ballast blocks.
Integrated bonding: UFO and EFO clamps bond the modules to the rails, and the rail connectors bond the rails to the pipe. Only one grounding lug is needed per array.
25-year warranty against impairing defects.

Kit design

Layout: modules in landscape, 4 high per column, with 2 XR1000 rails per column spanning the north and south cross pipes.
Panel fit: sized for large-format panels up to 2278 × 1134 mm (for example 580–585W bifacial modules) with 30–40 mm frames. Also fits 1134 mm-wide panels such as 445–455W modules.
Substructure: 3" Schedule 40 pipe, with one north/south pier pair at each column (E-W pier spacing about 7'7").

What's in the box (IronRidge components)

Panels	Layout (columns × high)	XR1000 17' rails	3" Bonded Rail Connectors	3" Top Caps	UFO mid clamps	EFO end clamps	Grounding lug	End cap bags
8	2×4	4	8	6	12	8	1	1
12	3×4	6	12	8	18	12	1	1
16	4×4	8	16	10	24	16	1	1
20	5×4	10	20	12	30	20	1	1
24	6×4	12	24	14	36	24	1	2
28	7×4	14	28	16	42	28	1	2
32	8×4	16	32	18	48	32	1	2
36	9×4	18	36	20	54	36	1	2
40	10×4	20	40	22	60	40	1	2

Part numbers: XR-1000-204A rail (17', clear) · GM-BRC3-01-M1 Bonded Rail Connector, 3" · 70-0300-SGA Top Cap, 3" · UFO-CL-01-A1 Universal Fastening Object · UFO-END-01-A1 End Fastening Object (30–40 mm) · XR-LUG-04-A1 Grounding Lug · XR-1000-CAP End Caps (10 sets per bag).

Buyer-supplied materials (not included)

Steel pipe is bought locally to save on freight. Each kit needs:

Panels	Array width (approx.)	Vertical piers (3" Sch 40)	Cross pipe (3" Sch 40)
8	15.0 ft	6	2 runs × 18 ft (36 ft total)
12	22.6 ft	8	2 runs × 25 ft (50 ft total)
16	30.2 ft	10	2 runs × 33 ft (66 ft total)
20	37.7 ft	12	2 runs × 40 ft (80 ft total)
24	45.3 ft	14	2 runs × 48 ft (96 ft total)
28	52.8 ft	16	2 runs × 55 ft (110 ft total)
32	60.4 ft	18	2 runs × 63 ft (126 ft total)
36	67.9 ft	20	2 runs × 70 ft (140 ft total)
40	75.5 ft	22	2 runs × 78 ft (156 ft total)

Pipe: 3" NPS ASTM A53 Grade B Schedule 40, hot-dip galvanized (or 3.500" × 8 ga galvanized mechanical tubing).
Join cross pipe longer than one stick with galvanized threaded couplings, or over a top cap. Keep each continuous run under 100 ft.
Pier length depends on tilt angle, ground clearance and frost depth for your site.
Foundation: concrete, or approved ground screws (American Ground Screw Model 3 or Krinner KSF G114, 1300 mm minimum).
Copper grounding wire (14–4 AWG) and a direct-to-earth ground per NEC 250 and 690.

Before you order

Pier spacing and foundation depth depend on your site's wind speed, snow load and soil. The quantities above are based on a typical design. Run your exact array through IronRidge's free Design Assistant (ironridge.com/design) to confirm your engineering values. Sites with high wind or heavy snow, or arrays on ground screws, may need diagonal braces (GM-DB3) or extra piers. Contact us and we'll quote the add-ons.

Installation

Installation takes five steps: build the base, connect the substructure, place the rails, secure the grounding lug, and secure the modules. You'll need a post-hole digger or auger, 7/16", 9/16", 15/16" and 1/2" sockets, torque wrenches (0–300 in-lbs and 10–40 ft-lbs), a 3/16" Allen key and a level. A licensed electrician or solar contractor should handle the electrical bonding and grounding.