PV Racking System utilizes Pi-rail technology.

Available in portrait and landscape versions, Sigma I XL Open Terrain Racking System combines single-post principle of Sigma I with Pi-rail technology of Sigma II, which consists of horizontal beam that provides strength and stability with minimal material usage. Landscape configuration provides click-system for assembling modules, while portrait version uses Quickstone

[source: http://news.thomasnet.com/fullstory/PV-Racking-System-utilizes-Pi-rail-technology-20009220]


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