The lip dimension of cold formed steel C-sections is optimized according to the provisions of CSA Standard CAN/CSA-S136-M89 'Cold formed steel structural members.' The provisions in the 1989 edition of S136 are compared with those of the 1984 edition. The interaction of many of the elements is described and the manner in which the design standard takes the interaction into account is discussed. The lip sizes of C-sections are optimized in order to maximize flexural resistance and minimize cross-sectional area. An optimal C-section is one which the flange is nearest to being fully effective. The optimal geometry generally has a lip-to-flange ratio of 3/8, which is restricted by a maximum lip flat width of 14 times the steel thickness. An optimal section based on the 1989 edition of S136 has a lower flexural resistance and a longer lip than an optimal C-section based on the 1984 edition of S136. Due to certain changes in the 1989 edition of S136, cold work of forming is now applicable in fewer cases than previously allowed by the 1984 edition of S136.

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  • Corporate Authors:

    National Research Council of Canada

    Research Journals
    Ottawa, Ontario K1A 0R6,   Canada 
  • Authors:
    • Dinovitzer, A S
  • Publication Date: 1992-2

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Filing Info

  • Accession Number: 00621917
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 31 1992 12:00AM