1.1 本规范涵盖了五种等级的镀铝钢绞线，由多条带铝涂层的圆形钢丝组成，用作拉线、信使、跨线和类似用途。 1.2 涵盖的五个等级如下: 1.2.1 公用事业 1.2.2 常见的 1.2.3 西门子马丁， 1.2.4 高强度，以及 1.2.5 超高强度。 1.3 各等级绞线的最小断裂强度在 表1 。 1.4 以英寸-磅为单位的数值应视为标准。括号中给出的值是国际单位制的数学转换，仅供参考，不被视为标准。 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 five grades of aluminum-coated, steel wire strand, composed of a number of round, steel wires, with aluminum coatings, for use as guys, messengers, span wires, and for similar purposes. 1.2 The five grades covered are as follows: 1.2.1 Utilities, 1.2.2 Common, 1.2.3 Siemens-Martin, 1.2.4 High-Strength, and 1.2.5 Extra High-Strength. 1.3 Minimum breaking strengths of strand for each grade are specified in Table 1 . 1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 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.