AASHTO M 273M-17涵盖了单室预制钢筋混凝土箱形截面，其覆盖层小于0.6m，承受公路荷载，拟用于涵洞施工和雨水、工业废物和污水输送。本公制规范等同于M 273，在技术内容上兼容。本规范主要是制造和采购规范。然而，标准设计也包括在内，附录X1中给出了用于开发这些设计的标准。本产品的成功性能取决于箱形截面、垫层、回填的正确选择、工厂的受控制造，以及确保安装符合施工规范。 此处规定的预制钢筋混凝土箱形截面的业主应注意，荷载条件和现场要求必须与规定的箱形截面相关，并且必须在施工现场进行检查。AASHTO M 259M适用于承受0.6m或以上覆土公路荷载或仅承受恒载的箱形截面。如果需要荷载和阻力系数设计（LRFD），则使用ASTM C 1577。

AASHTO M 273M-17 covers single-cell, precast reinforced concrete box sections with less than 0.6 m of cover subjected to highway loadings and intended to be used for the construction of culverts and for the conveyance of storm water, industrial wastes, and sewage.This metric specification is equivalent to M 273 and is compatible in technical content.This specification is primarily a manufacturing and purchasing specification. However, standard designs 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, controlled manufacture in the plant, and care that the installation conforms to the construction specifications. The owner of the precast reinforced concrete box sections specified herein is cautioned that the loading conditions and the field requirements must be correlated with the box sections specified and inspection must be provided at the construction site.AASHTO M 259M is to be used for box sections subjected to highway loading with 0.6 m or more earth cover, or subjected to dead load only.If load-and-resistance factor design (LRFD) is required, then use ASTM C 1577.