Official Journal of the Japan Wood Research Society
Table 4 Statistical parameters of compression strength for different grades
From: A determination method of compressive design value of dimensional lumber
Grade | No. | Un-adjusted value (UCS) | Adjusted value (UCS12) | ||
|---|---|---|---|---|---|
AVG (MPa) | COV (%) | AVG (MPa) | COV (%) | ||
Ic | 418 | 49.555a | 19.5 | 49.841a | 19.3 |
IIc | 207 | 38.282b | 17.0 | 38.386b | 17.1 |
IIIc | 274 | 41.401b | 24.8 | 40.956b | 24.7 |
IVc | 150 | 39.608b | 28.8 | 39.000b | 28.5 |