Environmental Product Declaration (EPD)
An Environmental Product Declaration (EPD), based on a life-cycle assessment (LCA), is a standardized way of quantifying the environmental impact of a product. EPDs are developed following specific Product Category Rules (PCRs) and must be verified by a third-party to meet ISO 14025, 14040, 14044 standards.
The American Galvanizers Association (AGA) has developed industry-wide EPDs for hot-dip galvanized steel after fabrication hot-rolled sections, plate, and hollow structural sections. The EPDs were created by thinkstep, Inc. and verified by UL Environment utilizing data from the AGA, International Zinc Association (IZA), American Institute of Steel Construction (AISC) and Steel Tube Institute (STI). These industry-average EPDs can only be used by active members of the AGA in accordance with the ISO standards. Search the AGA's active galvanizer listing.
The three EPDs for hot-dip galvanized steel are cradle-to-gate analyses following the product category rule (PCR) for Designated Steel Construction Products, and conform to the requirements in ISO 14040/14044 standards. In essence, the EPDs cover the production of hot-dip galvanized steel from raw material acquisition through the galvanizing process, including steel production and fabrication and zinc refining. It does not account for Construction, Use, or End-of-Life stages, which can be seen in the full life-cycle assessment (LCA) of hot-dip galvanized steel conducted in 2008.
The AGA has compiled the three EPDs into one summary document. In addition to the summary document, the AGA has published three separate Transparency Briefs for the individual galvanized products: