1.1 本规范涵盖整体浇筑的单室预制钢筋混凝土箱形截面，用于涵洞施工和雨水、工业废物和污水的输送。 注1: 本规范主要是制造和采购规范。然而，根据AASHTO LRFD桥梁设计规范的标准设计也包括在内，用于开发这些设计的标准见 附录X1 本产品的成功性能取决于箱形截面、垫层、回填的正确选择，以及安装是否符合施工规范。此处规定的预制钢筋混凝土箱形截面的买方应注意，需要将荷载条件和现场要求与规定的箱形截面适当关联，并提供施工现场检查。 1.2 以英寸-磅为单位的数值应视为标准值。本标准不包括其他计量单位。 1.3 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）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》中确立的国际公认标准化原则制定的。

1.1 This specification covers single-cell precast reinforced concrete box sections cast monolithically and intended to be used for the construction of culverts and for the conveyance of storm water, industrial wastes and sewage. Note 1: This specification is primarily a manufacturing and purchasing specification. However, standard designs per the AASHTO LRFD Bridge Design Specifications are included and the criteria used to develop these designs are given in Appendix X1 . The successful performance of this product depends upon the proper selection of the box section, bedding, backfill, and care that the installation conforms to the construction specifications. The purchaser of the precast reinforced concrete box sections specified herein is cautioned that proper correlation of the loading conditions and the field requirements with the box section specified, and provision for inspection at the construction site, are required. 1.2 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 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.