Timber Connection Design: wood_screw
NDS 2018 (AWC) timber connection design values — dowel bearing strengths, withdrawal design values, and lateral design values (Z) for common nails, box nails, sinker nails, wood screws, lag screws, bolts, split ring connectors, shear plate connectors, and timber rivets by wood species group
| fastener type | record id | CD load duration typical | CM wet service | Cg group action | Ct temperature | Fe parallel psi (psi) | Fe perp psi (psi) | Fe small D psi (psi) | Z double shear lb (lb) | Z single shear lb (lb) | edge distance in (in) | end distance parallel in (in) | end grain factor Ceg (dimensionless) | fastener bending yield Fyb psi (psi) | fastener diameter in (in) | fastener length or size | min member thickness in (in) | notes | penetration depth min in (in) | row spacing in (in) | species group | specific gravity G (dimensionless) | toe nail factor Ctn (dimensionless) | withdrawal W lb per in (lb/in) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| wood_screw | ws_dfl_10 | 1 | 0.75 | 1 | 1 | 0 | 0 | 4,637 | 0 | 159 | 0.95 | 3.23 | 0.67 | 90,000 | 0.19 | #10 wood screw (2.5 in) | 1.5 | #10 wood screw D=0.190 in; Fe=16600*(0.50)^1.84=4637 psi (D<0.25 formula); W=2850*G^2*D=2850*(0.25)*0.190=135.4 lb/in per NDS 2018 Sec 12.2.2; Z=159 lb single shear 1.5 in side member from Yield Limit Mode IV | 1.52 | 2.28 | Douglas Fir-Larch | 0.5 | 0 | 135.4 |
| wood_screw | ws_sp_10 | 1 | 0.75 | 1 | 1 | 0 | 0 | 5,526 | 0 | 195 | 0.95 | 3.23 | 0.67 | 90,000 | 0.19 | #10 wood screw (2.5 in) | 1.5 | #10 wood screw in Southern Pine; W=2850*(0.55)^2*0.190=2850*0.3025*0.190=163.8 lb/in; Z=195 lb single shear | 1.52 | 2.28 | Southern Pine | 0.55 | 0 | 163.8 |
| wood_screw | ws_spf_10 | 1 | 0.75 | 1 | 1 | 0 | 0 | 3,364 | 0 | 118 | 0.95 | 3.23 | 0.67 | 90,000 | 0.19 | #10 wood screw (2.5 in) | 1.5 | #10 wood screw in SPF; Fe=16600*(0.42)^1.84=3364 psi; W=2850*(0.42)^2*0.190=2850*0.1764*0.190=95.5 lb/in; Z=118 lb single shear | 1.52 | 2.28 | Spruce-Pine-Fir | 0.42 | 0 | 95.5 |
This is a sample. Search the full timber connection design dataset and 300+ more by creating a free account and accessing the database.
Get started for FREE