2015 CSCE Annual Conference Regina - Building on our Growth Opportunities Conference
Dr. Shahria Alam, University of British Columbia
Canada’s 400 million hectares of land area are covered with forest, which is 43.6 percentage of its total land area. Through a sustainable forest management this huge forestry resources can be utilized without creating any impact to the global environment. Construction of civil infrastructure with timber is a viable option for utilizing this huge resource. Timber I-joist is an engineered building construction element produced from solid timber and Oriented Strand Board (OSB) as flange and web, respectively. Timber I-joists are commonly used in building construction due to easiness of passing the service conduits and ducts through openings in the OSB web of I-joists and the passageway for service conduits and ducts usually made without considering the structural integrity of the system. This research study investigated the ultimate capacity of wood I-joists in the presence of flange cut. A total of 100 specimens were tested with various sizes and locations of openings in the flange. 10 specimens were tested as control beams with no openings. I-joists were tested with four points bending test in two different span lengths of 12 feet and 20 feet to evaluate the load carrying capacity of the I-joist. Based on the test results, linear and non-linear regression models were developed for the load-deflection response of each series of I-joists and Akaike Information Criterion (AIC) has been calculated to determine the best fit model. It is found that the linear models are well fitted for predicting the load capacity of the I-joists for structural analysis.