1.1 本规范涵盖预应力混凝土施工中使用的低松弛、锯齿状270I[1860I]级七线钢绞线。基于绞线的标称面积，270I[1860I]级的最小抗拉强度为270 ksi[1860 MPa]。 1.2 本规范的文本引用了提供解释材料的注释和脚注。这些注释和脚注（不包括表中的注释和脚注）不应被视为规范的要求。 1.3 本规范适用于任何英寸的订单- 磅单位（如A886规范）或国际单位制（如A886M规范）。 1.4 以英寸磅单位或国际单位制表示的数值应单独视为标准。在正文中，国际单位制显示在括号中。每个系统中规定的值可能不是完全相等的；因此，每个系统应独立使用。将两个系统的值组合在一起可能会导致不符合规范。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。

1.1 This specification covers low-relaxation, indented, Grade 270I [1860I] seven-wire steel strand for use in prestressed concrete construction. Grade 270I [1860I] has a minimum tensile strength of 270 ksi [1860 MPa] based on the nominal area of the strand. 1.2 The text of this specification references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables) shall not be considered as requirements of the specification. 1.3 This specification is applicable for orders in either inch-pound units (as Specification A886) or in SI units (as Specification A886M). 1.4 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 the specification. 1.5 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.