AASHTO T 249-03 (2020) is to be followed in ascertaining the quality of the seam of a helical lock seam corrugated pipe.
AASHTO T 249-03 (2020)
Original price was: $66.00.$33.00Current price is: $33.00.
Standard Method of Test for Helical Lock Seam Corrugated Pipe
American Association of State Highway and Transportation Officials , 2003