Skip to main content

Advertisement

Official Journal of the Japan Wood Research Society

Journal of Wood Science Cover Image

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
  1. fk represents the characteristic value of UCS12; AVG represents the mean value of UCS12; COV represents the coefficient of variation of UCS12