LRFD for Timber Structuresby Thomas G. Williamson, American Wood Systems, Tacoma, United States,
Abstract: The use of load and resistance design (LRFD) methodologies is increasingly becoming the standard analysis procedure for engineering design. The concrete industry has used a variation of LRFD for over 25 years. The steel industry introduced a LRFD methodology in 1986 with the publication of the first edition of the AISC Manual of Steel Construction Load and Resistance Factor Design. In 1988 an NCHRP project was initiated to rewrite the AASHTO Standard Specifications for Highway Bridges in a LRFD format. In order to introduce a parallel LRFD methodology for engineered wood construction, several major activities have been initiated by the wood products industry during the past decade. The culmination of all of these activities will be the introduction of a LRFD methodology for wood buildings and bridges during the next year or two. This LRFD methodology will establish the basis for carrying engineered wood construction into the 21st century.
Subject Headings: Load and resistance factor design | Wood construction | Construction methods | Wood structures | Highway bridges | Wood bridges | Steel construction | Bridge design
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