Bearing properties of engineered wood products I

Authors: Kweonhwan Hwang Kohei Komatsu

Publish Date: 2002/08

Volume: 48, Issue: 4, Pages: 295-

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Abstract

The embedment tests of laminated veneer lumber LVL with two moduli of elasticity MOE 78 GPa and 98GPa parallel strand lumber PSL and laminated strand lumber LSL were conducted in accordance with ASTMD 5764 The loadembedment relation for each of these engineered wood products EWPs was established The directional characteristics of bearing strength σe initial stiffness k e and effective elastic foundation depth were obtained from the tested results The effective elastic foundation depth α=E/k eE = MOE based on the theory of a beam on elastic foundation was obtained from thek e and MOE An α of 90° perpendicular to the grain was calculated by dividingE 90 MOE of 90° from the compression test but MOE of 0° E 0 parallel to the grain obtained from the bending test byk e90 the initial stiffness of 90° This study aimed to obtain the bearing characteristics of each EWP taking into consideration their anisotropic structures for estimating the fastening strength of a doweltype fastener The relations between the bearing coefficients δ ek eα on the loading direction and dowel diameter were established from the loadembedment curves Based on the results of the embedment test tested EWPs showed different tendencies in all directions from wood and glued laminated timber

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