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Title: Design of Multiple Bolted Connections for Laminated Veneer Lumber
Author: Yeh, Borjen; Rammer, Douglas; Linville, Jeff;
Source: In: WCTE 2014, World Conference on Timber Engineering, Quebec City Canada, August 10-14; 2014; 10 p.
Publication Series: Full Proceedings
Description: The design of multiple bolted connections in accordance with Appendix E of the National Design Specification for Wood Construction (NDS) has incorporated provisions for evaluating localized member failure modes of row and group tear-out when the connections are closely spaced. Originally based on structural glued laminated timber (glulam) members made with all L1 Douglas fir-Larch laminating lumber, the NDS provisions were confirmed by additional analysis, which indicates the applicability of the provisions to glulam with reduced design shear values. Due to the similarity to glulam in the grain orientation and layup strategy, laminated veneer lumber (LVL) is subject to similar failure modes. As a result, a study was initiated by APA – The Engineered Wood Association and the LVL industry, in collaboration with the Forest Products Laboratory (FPL) of the U.S. Department of Agriculture (USDA) to evaluate if a reduced design shear stress is necessary for LVL under similar multiple bolted connection configurations. This paper describes the test results obtained from the study, which indicate that an adequate load factor exists for LVL multiple bolted connections without a reduction in the LVL design shear stress when designed in accordance with Appendix E of the NDS.
Keywords: multiple bolted connections, laminated veneer lumber, group tear-out, failure modes
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Yeh, Borjen; Rammer, Douglas; Linville, Jeff 2014. Design of Multiple Bolted Connections for Laminated Veneer Lumber. In: WCTE 2014, World Conference on Timber Engineering, Quebec City Canada, August 10-14; 2014; 10 p.
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