Table 6.
Withdrawal resistance of lag screws depending on the grain direction
| Specimen symbol | σw(N/mm) | 5 percentile(N/mm) | W*(N/mm) |
| 7.79LL-T7.79LL-R7.79LL-C | 177.6196.9126.1 | 156.0161.083.5 | 78.080.541.7 |
| 7.79LS-T7.79LS-R7.79LS-C | 119.4124.7 86.6 | 83.687.255.0 | 41.843.627.5 |
W: allowable withdrawal load (N/mm) obtained by dividing the 5 percentile by the safety factor of 2.0