C858-19 Standard Specification for Underground Precast Concrete Utility Structures
- See also WK83016 proposed revision
C891-20 Standard Practice for Installation of Underground Precast Concrete Utility Structures
- See also WK91299 proposed revision
C1037-16 Standard Practice for Inspection of Underground Precast Concrete Utility Structures
- See also WK88957 proposed reapproval
- See also WK73282 proposed revision