When the tensile strength of steel or wrought iron shell plates is not known, it shall be taken as 55,000 psig for steel and 45,000 psig for wrought iron.
S.D. Admin. R. 61:08:05:17.01
General Authority: SDCL 34-29A-16.
Law Implemented: SDCL 34-29A-16, 34-29A-22, 34-29A-24.