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Case Studies
Berryville Solar Field

Case Studies

As with any investment in a structure, ensuring the foundations of solar panels can withstand loads is paramount to their longevity. Helical piles have been commonly used as an efficient alternative for ground mount solar panels which are designed with their own support system extending to the ground.

Situation: A series of Tenk Solar Panels were to be installed in Berryville, Arkansas. Tenk Solar Panels are rack mount, rather than ground mount, meaning a series of foundations support a singular monorail or rack to which an array of panels are then attached. Additionally, the foundations were to be installed at a remote field where access with a concrete truck proved difficult.

Proposed Solution: Based on load requirements from Tenk and the soil information from the site, an engineer developed a plan utilizing (16) 2 7/8" helical piles that would be torqued to 6 ft. into the soil and extend up to 4 ft. out of the soil. The piles had to be installed within 1 in. of the plan both vertically and horizontally. Once installed, they could be trimmed to match the side grade and then have the caps installed.

Outcome: During installation several pile locations encountered a layer of rock which had to be drilled through in order for installation to be complete. Overcoming the unforeseen obstacle, all piles were installed within required parameters, taking only half a day, and were ready for the solar panels to be installed immediately.

Download the full case study in pdf format

Project Type: Commercial
Year: 2017
Product Scope: New Construction
Product: Helical
Design Capacity: 26 to 50 kips
Pile Diameter: 2 7/8"

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