Effect of the Withdrawal Strength of Wood Screws in Domestic Wood by Shear Strength with Different Growth Ring Orientation

Cha, Jae Kyung

doi:10.5658/wood.2012.40.6.363

Cited by 4 publications

(1 citation statement)

References 1 publication

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“…Cha (2011) has studied on predicting the withdrawal load of wood screws in domestic wood depending on screw diameter, penetration depth and specific gravity of wood. Cha (2012) has performed research on the withdrawal strength of wood screws in domestic wood depending on the shear strength with different growth ring orientation. Oh (2013) measured the withdrawal and lateral resistance of nail joints composed of dimension lumber and OSB, which is commonly used in light-frame wood construction, and reported that withdrawal-resistance is proportional to the density of lumber.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Withdrawal Resistance of Screw-Type Fasteners Depending on Lead-Hole Size, Grain Direction, Screw Size, Screw Type and Species

LEE¹,

Jang²,

Kang³

2021

Journal of the Korean Wood Science and Technology

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Screw-type fasteners are widely used to make connections between wood members or between wood and steel connectors because they can tolerate the applied loads by withdrawal or shearing. In this study, we evaluated the withdrawal resistances of the screw-type fasteners and analyzed the effects of the lead-hole size, relative grain direction (tangential, radial, and cross-sections) of the wood member, screw diameter, screw type, and species. Two wood species, including domestic larch and imported spruce, and three screw-type fasteners, including domestic lag screws (diameters of 9.46, 7.79, and 6.27 mm), domestic tapping screw (diameter, 6.3 mm), and imported Sherpa screw (diameter, 8.0 mm) were used. To assess the effect of lead-hole size, the lead holes with diameters corresponding to 68.7%, 70.8%, and 74.0% of the shank diameter of the lag screw were predrilled. The lead hole corresponding to 74% of the shank diameter was selected for this study because the smaller lead holes required higher rotational force for installation, which may cause damage in the screw neck, although there was no significant difference in the withdrawal resistance depending on the lead-hole sizes applied in this study. The lag screws installed on the tangential and radial surfaces showed similar withdrawal resistances to each other, which were greater than those installed on the cross-sectional surface. As the lag screw diameter increased from 6.27 mm to 9.46 mm, the withdrawal resistance also increased proportionally. The withdrawal resistance of the tapping screw having a diameter of 6.3 mm was almost 1.6 times higher than that of the lag screw having a similar diameter of 6.27 mm, while that of Sherpa screw having a diameter of 8.0 mm was around 1.4 times higher than that of the lag screw having a similar diameter of 7.79 mm.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Withdrawal Resistance of Screw-Type Fasteners Depending on Lead-Hole Size, Grain Direction, Screw Size, Screw Type and Species

LEE¹,

Jang²,

Kang³

2021

Journal of the Korean Wood Science and Technology

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Effects of combinations of lamina grade and thickness, and span-to-depth ratios on bending properties of cross-laminated timber (CLT) floor

Pang

Jeong

2019

Construction and Building Materials

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Predicting the Screw Withdrawal Load of Commercial Particleboard Manufactured in Korea

Cha¹

2013

Journal of the Korean Wood Science and Technology

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Tests were carried out on commercial particleboards manufactured in Korea to evaluate and modify formulas which had previously been developed to predict the holding loads of screw on the face and edge of specimen. Screw sizes were No. 6, 8 and 10 used in this study. The withdrawal loads of screws were developed to predict as a function of screw diameter, depth of penetration, specific gravity and IB of particleboard. Predicted equations were fitted to the test results of different length of No. 8 screws. Results of tests indicate that IB is a better predictor of holding loads on the face of particleboard than SG. On the other hand, SG is a good indicator of holding load on the edge of particleboard.

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Effect of the Withdrawal Strength of Wood Screws in Domestic Wood by Shear Strength with Different Growth Ring Orientation

Cited by 4 publications

References 1 publication

Evaluation of Withdrawal Resistance of Screw-Type Fasteners Depending on Lead-Hole Size, Grain Direction, Screw Size, Screw Type and Species

Evaluation of Withdrawal Resistance of Screw-Type Fasteners Depending on Lead-Hole Size, Grain Direction, Screw Size, Screw Type and Species

Effects of combinations of lamina grade and thickness, and span-to-depth ratios on bending properties of cross-laminated timber (CLT) floor

Predicting the Screw Withdrawal Load of Commercial Particleboard Manufactured in Korea

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