AASHTO R73 – Standard Practice for Evaluation of Precast Concrete Drainage Products
This standard practice describes the evaluation of precast concrete pipe, box culverts, manholes, and drainage inlets.
This standard also describes criteria for acceptable products, repairable products, and the rejection of defective products. All repairs shall conform to the criteria found in this document or to contract documents as applicable.
precast concrete pipe; box culvert; manhole; drainage inlet