AASHTO M 273M-17

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.