This report contains a life cycle assessment of hot dip galvanized steel. The study was carried out within the framework of an assignment performed for RISE KIMAB by Mats Zackrisson at RISE IVF, in the project Optimal Maintenance of Hot-Dip Galvanized Steel Structures. The report is financed by Infra Sweden 2030, a joint innovation program by Vinnova, Formas and Energimyndigheten. Steffen Schellenberger at RISE IVF has reviewed the report. Björn Tidbeck at RISE KIMAB and Björn Stam at ST Control have with the aid of paint manufacturers, painting contractors, equipment manufacturers and painting inspectors contributed with data and knowledge to the study. The report and conclusions in their current form are not intended for comparisons with competing products, but to form a basis for developing optimal maintenance routines for hot-dip galvanized infrastructure objects in the long term.