Transcription of Specifying and Detailing for Hot-Dip Galvanizing
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Specifying and Detailing for Hot-Dip Galvanizing
Hot-Dip GalvanizingBy Philip G. Rahrig and John KrzywickiAN OVERVIEW FOR ENGINEERS, ARCHITECTS, AND DETAILERSS pecifying and Detailing forHigh quality galvanized coatings are obtained when steel assemblies are designed to promote un-restricted flow of cleaning solutions and molten zinc during the Hot-Dip Galvanizing process. A basic understanding of how steel is handled in the Galvanizing plant and what the steel undergoes in the application of the galvanized coating will aid steel detailers in preparing drawings that will produce the best possible galva-nized finish. The viscosity of liquid zinc at the Galvanizing temperature plays a large role in which assemblies can be galva-nized easily. The viscosity of molten zinc prevents it from entering gaps or crevices less than 3/32.
Hot-Dip Galvanized Structural Steel Products and Procedure for Detecting Embrittlement, for additional information). If ex-cessive cold bending or forming is necessary, the steel must be heat treated at 1100 ºF (590 ºC) for one hour, for every inch of section thickness to relieve stresses.
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