Full Name

ASTM C850 – Standard Specification for Precast Reinforced Concrete Box Sections for Culverts, Storm Drains, and Sewers with Less Than 2 ft of Cover Subjected to Highway Loadings


This specification covers 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 conveyance of storm water, industrial wastes, and sewage.

A complete metric companion to Specification C850 has been developed – C850M; therefore, no metric equivalents are presented in this specification.


concrete box-precast; culvert; sewer pipe; storm drain