Check multiple solar pile elevations against design tolerance in a single table. Enter as-built and design elevations for each pile to get deviation in inches, pass/fail status, and a block summary including pass rate and maximum deviation.
RTK GPS rovers for solar pile elevation surveys. Topcon, Trimble, and Leica equipment for utility-scale solar construction.
Shop Express Tools →The standard pile verification workflow on utility-scale solar sites involves the survey crew working one to two block sections ahead of the racking installation crew. After piles are driven in a section, the GPS rover operator surveys every pile top and logs data by pile ID. The survey output is reviewed against design elevations, and failed piles are scheduled for correction before the racking crew reaches that section.
This calculator is designed for quick field-side or office-side review when you have a section of pile data to check. Enter the data and immediately see the pass/fail status for the whole section. For daily pile surveys at project scale, use Sitemark to log GPS shots directly in the field and generate pile survey reports organized by row and block.
Deviation: 0 to ±1 in (within tolerance)
Pass. No corrective action required. Proceed to racking installation.
Deviation: +1 to +3 in (pile too high)
Field-cut the pile to design elevation. Mark cut line, cut with angle grinder, deburr end. Re-survey after cut to confirm.
Deviation: -1 to -3 in (pile too short)
Install pile extension coupler per manufacturer spec. Extension length = deficit + splice overlap. Re-survey to confirm within tolerance after installation.
Deviation: greater than ±3–4 in (large deviation)
Notify EPC engineer before correcting. Large deviations may indicate a pile driving or GPS template error affecting multiple piles. Recheck adjacent piles to determine if the issue is isolated or systematic.
Most EPC contractors target 95–98% first-pass acceptance rate on pile elevations. Below 90% typically triggers a review of the pile driving process (template accuracy, GPS datum, operator technique). Individual corrective actions for failing piles are expected and manageable; a systematic high failure rate is a process problem that requires immediate attention.
Document pass rate by pile driving equipment (if multiple drivers are on site) to identify if one machine or crew is producing more out-of-tolerance piles. This data is valuable for the EPC contractor and subcontractor quality conversations — it shifts the discussion from "individual pile problems" to "process performance data."
The industry standard for solar pile top elevation tolerance is ±1 inch (±25mm). Most fixed-tilt and single-axis tracker racking manufacturers specify this in their IOM (Installation and Operations Manual). High-wind-zone systems may require ±0.5 inch. Confirm the tolerance with the specific racking system drawings before starting pile verification surveys.
This calculator allows you to check as many piles as needed in a single session. Add rows for each pile, enter as-built and design elevations, and the calculator returns deviation in inches, pass/fail status for each pile, and a summary of pass rate, total passed, total failed, and maximum deviation. For large projects with thousands of piles, use Sitemark's full field documentation platform to log GPS shots and track piles at scale.
Pass rate is the percentage of piles in a row section or block that meet the elevation tolerance. A 100% pass rate means all piles can proceed directly to racking installation. A pass rate below 100% means some piles need corrective action (cuts or extensions) before racking can start in that section. Most EPC contractors track pass rate by block and row to identify pile driving equipment or GPS template issues causing systematic elevation problems.
Yes — enter the as-built pile stick-up height (elevation above grade) as the "as-built elevation" and the design stick-up as the "design elevation." The deviation calculation is the same regardless of whether you are working in absolute project elevation or relative heights above grade. Use whichever reference system matches your racking structural drawings.
Pile elevation survey results should be reported by block and row section, showing each pile ID, as-built elevation, design elevation, deviation in inches, and pass/fail status. Include a block summary with total piles surveyed, pass count, fail count, pass rate, and maximum deviation. Failed piles should be listed separately with the corrective action required (cut or extension) and the required correction dimension. Sitemark generates this report format automatically from field data.
Typically ±1 in for solar racking systems
| Pile ID | As-Built Elev (ft) | Design Elev (ft) |
|---|---|---|