Abstract
AbstractThe engineered nature of metal plate–connected wood trusses may not be well understood by installers and other trade professionals, which can result in installation errors. Truss manufacturing, handling, and installation specifications are included in national design standards and truss misinstallation is therefore a code violation. Through use of the Delphi method, an expert-validated inspection methodology was developed by interviewing code officials, home inspectors, and truss manufacturers. The results included (1) identification of truss installation errors most likely to occur, (2) best practices for inspection methods, (3) determination of authoritative documentation, and (4) validation of the research methods. The inspection should begin at the top of the structure and move in a circular, systematic pattern downward through each level, and should concentrate on the identified high-risk aspects of truss installation. Installation problems include the following: broken or cut webs and chords...
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