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Strength of plywood joints with overdriven nails
The strength of plywood joints with overdriven sheathing nails is discussed in this paper. Plywood joints constructed with 15/32-inch plywood sheathing attached to 2 by 4 wood members using 8d common or 8d cooler nails were tested using the sequential phased displacement (SPD) loading protocol. Four...
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Published in: | Forest products journal 2006-07, Vol.56 (7-8), p.33-38 |
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Main Authors: | , , |
Format: | Article |
Language: | English |
Subjects: | |
Online Access: | Get full text |
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Summary: | The strength of plywood joints with overdriven sheathing nails is discussed in this paper. Plywood joints constructed with 15/32-inch plywood sheathing attached to 2 by 4 wood members using 8d common or 8d cooler nails were tested using the sequential phased displacement (SPD) loading protocol. Four nail-drive depths were investigated using cooler nails: flush driven, 1/16 inch overdriven, 1/8 inch overdriven, and 3/16 inch overdriven. Only flush-driven common nails were investigated. The results indicate that the stiffness of plywood joints using cooler nails increases from 10 to 21 percent with an increase in nail-drive depth. However, the strength decreases 11 percent for a 3/16-inch overdriven depth. Moreover, with an increase in nail-drive depth, the displacement capacity decreases from 38 to 77 percent, and energy dissipation decreases from 16 to 74 percent. Plywood joints using flush-driven common nails have similar mechanical properties compared to plywood joints using flush-driven cooler nails, except joints using common nails have 36 percent less displacement capacity. |
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ISSN: | 0015-7473 2376-9637 |