This archive Design Manual edtion includes: Part I, the 1986 Specification for the Design of Cold-Formed Steel Structural Members and the December 11, 1989 Addendum; Part II, the Commentary, which provides detailed background on the provisions of the Specification and explains the major difference between the 1986 Edition and the 1989 Addendum; Part III, Supplementary Information; Part IV, Illustrative Example; Part V, Design Aids; Part VI-Computer Aids; and Part VII, Test Procedures.