The Canadian Approach in the Design of Wood Structures: Conversion to Limit States Design

by Dominique P. Janssens, (M.ASCE), Canadian Wood Council, Ottawa, Canada,



Document Type: Proceeding Paper

Part of: Structures Congress XII

Abstract:

During the early 70's, the National Building Code of Canada (NBCC) established the principle that structural design be carried out using the limit states design (LSD) method. The technical committee responsible for Engineering Design in Wood undertook the task to develop a standard based on limit states design. In 1984, the first LSD version was referenced in the NBCC, in parallel with the established method of allowable stress design. A second LSD edition was published in 1989. The LSD standard is in preparation for a third edition. Simultaneously, a proposal is being made to withdraw allowable stress design in wood from the NBCC in 1995. The history, background, acceptance, use and implications of the limit states design method for structural design in wood in Canada will be presented, as well as some practical design considerations.

Subject Headings: Structural design | Building design | Allowable stress design | Wood structures | Standards and codes | Wood construction | Limit states | Canada

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