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Official Journal of the Japan Wood Research Society

Journal of Wood Science Cover Image

Table 6 Partial factors for different grades of dimensional lumber under different load combinations and ratios

From: A determination method of compressive design value of dimensional lumber

Grade Load combination Load ratios
0.0 0.25 0.5 1.0 2.0 3.0 4.0
Ic D + R 1.270 1.228 1.172 1.080 1.018 1.000 0.990
D + O 1.270 1.200 1.124 1.014 0.940 0.914 0.902
D + S 1.270 1.330 1.352 1.364 1.404 1.430 1.446
D + W 1.270 1.346 1.324 1.308 1.318 1.330 1.340
IIc D + R 1.216 1.176 1.122 1.034 0.976 0.956 0.948
D + O 1.216 1.150 1.076 0.970 0.900 0.876 0.864
D + S 1.216 1.274 1.294 1.306 1.344 1.370 1.386
D + W 1.216 1.290 1.268 1.252 1.262 1.274 1.282
IIIc D + R 1.356 1.314 1.250 1.140 1.054 1.020 1.002
D + O 1.356 1.284 1.198 1.066 0.962 0.924 0.902
D + S 1.356 1.420 1.436 1.424 1.436 1.448 1.458
D + W 1.356 1.440 1.410 1.378 1.366 1.366 1.368
IVc D + R 1.366 1.324 1.258 1.148 1.064 1.032 1.014
D + O 1.366 1.292 1.206 1.076 0.974 0.934 0.916
D + S 1.366 1.430 1.446 1.438 1.452 1.466 1.478
D + W 1.366 1.450 1.420 1.390 1.380 1.380 1.384