Section 4148.  Drain Tiles

4148.01     general requirements.

For concrete drain tile Mmeet the requirements of AASHTO M 178 or ASTM C 412, standard quality, extra quality, or special quality, as specified, or for clay drain tile meet AASHTO M 179 ASTM C 4, standard, extra quality, or heavy duty, as specified. When the quality is not specified, use extra quality tile in roadway embankments, and use standard or standard quality tile in other locations.