AC428 Modular Framing Systems Used to Support Photovoltaic (PV) Modules—Approved November 2012 (PDF Download)

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AC428 establishes guidelines for evaluation of metal modular framing systems intended for installation of photovoltaic (PV) panel arrays on roofs and walls of buildings (flush-mount system); and for installation of freestanding PV panel arrays that are not attached to buildings, but are intended for ground mounting (freestanding system).

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