If temporary structures having lives of 2-5 years are designed using criteria for permanent structures with lives of 50-75 years, overly conservative designs can result. This paper presents a systematic, rational basis for developing criteria for glue laminated timber temporary bridges and buildings. Second moment reliability theory, which requires estimates of the mean and coefficient of variation of resistance and load, is used to compute measures of safety, called safety index values. These index values are computed for permanent and temporary structural elements. Allowable stresses for temporary structures are determined by choosing corresponding safety index values which will provide adequate safety relative to the safety of permanent structures, while reflecting the temporary nature of the structures. Examples of how allowable flexural stresses are developed for bridges and buildings are given.

  • Supplemental Notes:
    • Also in ASCE Journal of the Structural Division, Vol. 104, No. ST9 (Sept. 1978), Pape 14031, pp 1485-1494, Sep 78. Pub. in Jnl. of the Structural Division, Proceedings of the American Society of Civil Engineers 104, nST9, Proceedings Paper 14031, p1485-1494, Sep 78.
  • Corporate Authors:

    National Bureau of Standards

    Connecticut Avenue at Van Ness Street, NW
    Washington, DC  United States  20008
  • Authors:
    • Knab, L I
    • Moody, R C
  • Publication Date: 1978-9

Media Info

  • Pagination: 10 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00312787
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: Final Rpt.
  • Files: TRIS
  • Created Date: May 7 2002 12:00AM