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Document Designation and Title Year Select Item(s) A998/A998M Standard Practice for Structural Design of Reinforcements for Fittings in Factory–Made Corrugated Steel Pipe for Sewers and Other Applications 08 A998/A998M Standard Practice for Structural Design of Reinforcements for Fittings in Factory—Made Corrugated Steel Pipe for Sewers and Other Applications 98(2003) A998/A998M Standard Practice for Structural Design of Reinforcements for Fittings in Factory-Made Corrugated Steel Pipe for Sewers and Other Applications 98