1.1 This specification covers aluminum alloy sheets used in the fabrication of corrugated aluminum pipe intended for use for storm water drainage, underdrains, culverts, and similar uses. The material is furnished corrugated in cut lengths, and uncorrugated in coils and cut lengths.

1.2 This specification is applicable to orders in either inch-pound units (as B744) or SI units (as B744M). Inch-pound units and SI units are not necessarily equivalent. SI units are shown in brackets in the text; they are the applicable values when the material is ordered to B744M.