Official Journal of the Japan Wood Research Society
Table 6 Statistical parameters of resistance stress (R) for each grade dimension lumber
Statistical parameters | Resistance stress (R) | ||
|---|---|---|---|
SS | No. 1 | No. 2 | |
Mean value (MPa) | 21.23 | 19.62 | 20.30 |
Standard deviation (MPa) | 4.54 | 3.87 | 4.40 |
COV (%) | 21.40 | 19.71 | 21.25 |