【国外标准】 Standard Specification for Continuous Hot-Dip Galvanized Steel Bars for Concrete Reinforcement

This specification covers requirements for steel reinforcing bars, with protective zinc or zinc-alloy coatings applied by the continuous hot-dip process. Continuous hot-dip galvanizing refers to the process of uninterrupted passage of long lengths of steel products through a molten bath of zinc or zinc-alloy. To control alloy formation and promote adhesion of the zinc or zinc-alloy coating with the steel base metal, the molten coating metal composition typically contains a percentage of aluminum ranging from 0.05 to 0.25. This aluminum is purposely supplied to the molten coating bath, either as a specified ingredient in the zinc spelter or by the addition of a master alloy containing aluminum.This specification prescribes ordering information (including specification for reinforcing bars to be coated, quantity of bars, and size and grade of bars) as well as requirements for steel reinforcing bars and coating bath metal; minimum average coating thickness grade and equivalent weight [mass]; finish and adherence of coating; inspection and certification; and permissible amount of damaged coating and repair of damaged coating.1.1 This specification covers steel reinforcing bars, with protective zinc or zinc-alloy coatings applied by the continuous hot-dip process.NOTE 1: The galvanizer is identified throughout this specification as the manufacturer.1.2 Guidelines for construction practices at the job-site are presented in Appendix X1.1.3 Guidelines for use of continuous hot-dip galvanized reinforcing bars with non-galvanized steel forms are presented in Appendix X2.1.4 The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes shall not be considered requirements of the specification.1.5 This specification is applicable for orders in either inch-pound units (as Specification A1094) or SI units (as Specification A1094M).1.6 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with this specification.1.7 This specification does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this specification to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.