1.1 本规范涵盖了由单独分段组成的预制钢筋混凝土箱形截面，这些分段一旦在现场正确组装，就构成了最终结构。这些结构旨在用于修建涵洞和输送雨水、工业废物和污水。 注1: 本规范主要是制造和采购规范。然而，根据本标准制造的箱涵旨在满足AASHTO LRFD桥梁设计规范的设计要求，因此，设计指南包含在 附录X1 . 注2: 该产品的成功性能取决于正确选择箱体截面、垫层、回填，并注意安装符合施工规范。此处规定的预制钢筋混凝土箱形截面的购买者应注意，需要将荷载条件和现场要求与规定的箱形截面进行适当的相关性，并在施工现场进行检查。 1.2 以英寸-磅单位表示的值应被视为标准值。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 precast reinforced concrete box sections comprised of separate segments that once properly field assembled make the final structure. These structures are 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, box culverts manufactured to this standard are intended to meet the design requirements of the AASHTO LRFD Bridge Design Specifications, and as such, design guidance is included in Appendix X1 . Note 2: 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.