CSA A23 1 19 CSA A23 2 19 Product CSA Group
Products requiring prestressing or post tensioning are produced in accordance with CSA A23 4 Note For references to tilt up construction see PCA PA163 and ACI 551R 1 3 3 If tolerances equivalent to the requirements of CSA A23 4 are desired then CSA A23 4 is specified for all precasting operations 1 3 4