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Document Designation and Title Year Select Item(s) C478 Standard Specification for Precast Reinforced Concrete Manhole Sections 12a C478 Standard Specification for Precast Reinforced Concrete Manhole Sections 12 C478 Standard Specification for Precast Reinforced Concrete Manhole Sections 11 C478 Standard Specification for Precast Reinforced Concrete Manhole Sections 09 C478 Standard Specification for Precast Reinforced Concrete Manhole Sections 08 C478 Standard Specification for Precast Reinforced Concrete Manhole Sections 07 C478 Standard Specification for Precast Reinforced Concrete Manhole Sections 06b C478 Standard Specification for Precast Reinforced Concrete Manhole Sections 06a C478 Standard Specification for Precast Reinforced Concrete Manhole Sections 06 C478 Standard Specification for Precast Reinforced Concrete Manhole Sections 05 C478 Standard Specification for Precast Reinforced Concrete Manhole Sections 03a C478 Standard Specification for Precast Reinforced Concrete Manhole Sections 03 C478 Standard Specification for Precast Reinforced Concrete Manhole Sections 02a C478 Standard Specification for Precast Reinforced Concrete Manhole Sections 02 C478 Standard Specification for Precast Reinforced Concrete Manhole Sections 97