AASHTO M 273:2011
AASHTO M 273:2011 Specification For Precast Reinforced Concrete Box Sections For Culverts, Storm Drains, And Sewers With Less Than 2 Ft Of Cover Subjected To Highway Loadings Describes single-cell, precast reinforced concrete box sections with less than 2 ft of cover subjected to highway loadings and intended to be used for the construction of culverts and for the conveyan