Historical
ASTM C478-97
Standard Specification for Precast Reinforced Concrete Manhole Sections
This specification covers precast reinforced concrete manhole base sections, riser sections, and appurtenances such as grade rings, tops, and special sections for use in sewer and water works. 1.2 A complete metric companion to Specification C 478 has been developed-C 478M; therefore, no SI equivalents are presented in this specification. Note 1-This specification is a manufacturing and purchase specification only, and does not include requirements for installation of metal frames, covers, and gratings for access purposes.
ASTM International [astm]