Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 4 Mean values and standard deviations of the air-dry density and bending properties of lumber in each visual grade

From: Bending properties of dimension lumber produced from Siberian larch (Larix sibirica) in Mongolia

Grade	n	AD (g/cm³)		MOE (GPa)		MOR (MPa)
Grade	n	Mean	SD	Mean	SD	Mean	SD
SS	108	0.60^a	0.05	10.08^a	2.43	52.8^a	21.9
No. 1	12	0.63^a	0.06	10.90^a	2.16	54.2^ab	19.8
No. 2	19	0.61^a	0.05	10.37^a	2.56	52.1^ab	21.1
No. 3	20	0.60^a	0.04	10.07^ab	2.35	48.8^ab	14.4
Out grading	31	0.60^a	0.04	8.38^b	2.00	40.2^b	14.9

The same letters (a and b) followed by mean values indicate no significance at the 5% level according to the Tukey–HSD test
n number of lumber pieces, AD air-dry density, MOE modulus of elasticity, MOR modulus of rupture, SD standard deviation, SS select structural

Back to article page