Standard Practice for
Installation of Underground Precast Concrete Utility
This standard is issued under the fixed designation C 891; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
click below Astm C 891 – 90 (Reapproved 2003) pdf free download