AASHTO M 273M:2011
AASHTO M 273M:2011 Specification For Precast Reinforced Concrete Box Sections For Culverts, Storm Drains, And Sewers With Less Than 0.6 M Of Cover Subjected To Highway Loadings [Metric] Includes 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 conveyan