1.1本规范仅涵盖特殊设计的碳钢起重机轨道，起重机跑道使用的标称重量为104 lb/yd（51.6 kg/m）至175 lb/yd（86.8 kg/m）。 1.2当需要标准T形轨段时，应根据规范A1订购。 1.3提供了可选性质的补充要求S1至S4。仅当买方在订单中指定时，才适用。 1.4以英寸-磅为单位的数值应视为标准值。

1.1 This specification covers carbon steel crane rails of special designs only, and nominal weights of 104 lb/yd (51.6 kg/m) through 175 lb/yd (86.8 kg/m) for crane runway use. 1.2 When standard tee rail sections are desired, they shall be ordered in accordance with Specification A1. 1.3 Supplementary Requirements S1 through S4 of an optional nature are provided. They shall apply only when specified by the purchaser in the order. 1.4 The values stated in inch-pound units are to be regarded as the standard.