Official Journal of the Japan Wood Research Society
Table 5 Characteristic values and fitting results of UCS12 of different grades
From: A determination method of compressive design value of dimensional lumber
Grades | fk/MPa | Model | Fitting AVG/MPa | Fitting COV/% | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
100% | 75% | 50% | 25% | 15% | 100% | 75% | 50% | 25% | 15% | |||
Ic | 34.4 | Normal | 49.2 | 49.0 | 48.8 | 48.1 | 48.8 | 19.5 | 18.4 | 17.6 | 16.2 | 17.0 |
Lognormal | 49.9 | 49.8 | 50.0 | 50.2 | 52.2 | 19.8 | 19.5 | 20.0 | 20.2 | 22.8 | ||
2-P-Weibull | 48.8 | 48.5 | 48.0 | 46.6 | 46.9 | 20.0 | 18.1 | 16.4 | 13.5 | 13.9 | ||
IIc | 26.3 | Normal | 38.3 | 38.3 | 38.2 | 38.3 | 39.9 | 16.5 | 16.8 | 16.4 | 16.2 | 18.6 |
Lognormal | 38.6 | 38.8 | 39.0 | 39.9 | 43.7 | 16.7 | 17.7 | 18.4 | 20.0 | 26.2 | ||
2-P-Weibull | 37.9 | 37.9 | 37.6 | 37.1 | 38.2 | 16.8 | 16.5 | 15.2 | 13.5 | 15.2 | ||
IIIc | 23.1 | Normal | 40.5 | 40.5 | 40.4 | 41.9 | 42.2 | 22.7 | 22.1 | 21.7 | 24.3 | 24.7 |
Lognormal | 41.3 | 41.4 | 41.9 | 46.8 | 50.5 | 23.2 | 23.7 | 25.4 | 34.6 | 39.7 | ||
2-P-Weibull | 40.2 | 40.1 | 39.7 | 40.9 | 41.1 | 22.8 | 21.6 | 20.2 | 22.0 | 22.4 | ||
IVc | 22.0 | Normal | 38.2 | 37.8 | 37.2 | 37.7 | 42.0 | 27.7 | 25.6 | 22.5 | 23.2 | 28.4 |
Lognormal | 39.1 | 39.0 | 38.8 | 41.7 | 54.1 | 28.1 | 27.6 | 26.5 | 32.5 | 49.5 | ||
2-P-Weibull | 38.0 | 37.6 | 36.7 | 36.7 | 41.9 | 27.8 | 25.4 | 21.1 | 20.7 | 27.3 | ||