Forum Post: "Use Alt. Occ. Allowable" for nonstandard materials

Hi, In AutoPIPE (09.06.00.19 and design code B31.3), I've been having issues with the "Use Alt. Occ. Allowable" not working. i.e. the allowable is 1.33 x S not 0.9 x Sy Is this a known issue? Seems to effect nonstandard materials only, and doesn't go away when "Use Al. Occ. Allowable" is unticked then reticked. Thanks Fergus