This specification covers steel sheet used in the manufacture of corrugated steel pipe (CSP) for storm sewers@ culverts@ drains@ and similar uses. The sheet is zinc-coated (galvanized) by the hotdip process@ and is produced in two coating weights@ 610 g/m2 and 1220 g/m2. Material for this use is furnished in coils@ flat in cut lengths@ and corrugated in cut lengths.