Official Journal of the Japan Wood Research Society
From: Prediction of withdrawal resistance for a screw in hybrid cross-laminated timber
Group | Wood material | Screw | Repetition | Withdrawal resistance | Withdrawal strengthc (MPa) | ||||
---|---|---|---|---|---|---|---|---|---|
Type | Thickness (mm) | Diameter × length (mm) | Penetration depth (mm) | Average (kN) | COVa | 5th percentile valueb (kN) | |||
Solid-6.5d | Solid wood | 24 | 6.5 × 65 | 24 | 30 | 4.32 | 0.20 | 2.85 | 5.81 |
Solid-8.0 | 8.0 × 100 | 24 | 32 | 4.49 | 0.19 | 3.19 | 5.29 | ||
Plywood-6.5 | Plywood | 24 | 6.5 × 65 | 24 | 30 | 5.43 | 0.07 | 4.77 | 9.74 |
Plywood-8.0 | 8.0 × 100 | 24 | 30 | 6.10 | 0.06 | 5.47 | 9.07 | ||
Ply-lam-6.5 | Ply-lam (25-24-25-24-25)e | 123 | 6.5 × 65 | 33 | 32 | 5.30 | 0.17 | 3.76 | 6.72 |
Ply-lam-8.0 | 8.0 × 100 | 70 | 32 | 13.96 | 0.10 | 12.00 | 8.16 |