Bending test of the laminated veneer lumber beam with screws or bolts
Abstract
<p>In recent years, there has been an increase in the construction of mid- to high-rise buildings using wood for structural members. Laminated veneer lumber (LVL), in which the wood fibers run in one direction, is advantageous in transmitting shear and bending stresses in columns and beams of long members. Thus, veneer laminated lumber is arranged so that the beam direction is the strong axis, and each LVL material is dry-joined. Bending tests are conducted using the pitch of screws and bolts used for joining and the number of LVL lumber as parameters. To simplify construction, the pitch of the joints should be large and the number of drilling and other processing should be as small as possible. As a result, it was found that a maximum joint pitch of 600 mm is desirable, and the maximum bending strength is almost the same regardless of whether bolted or screwed joints are used, as long as the joint pitch is 600 mm or greater.</p>
Reference
Yasuhiro Fuchita; Toshiharu Nakanishi; Yuya Hayashi; Makoto Nakamura; Masanori Fujita. (2025). Bending test of the laminated veneer lumber beam with screws or bolts. IABSE Reports. https://doi.org/10.2749/tokyo.2025.2788
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