Partial compression strength of sugi (Japanese cedar, Cryptomeria japonica) wood near the pith perpendicular to the grain

Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 1 Partial compressive strength perpendicular to the grain of specimens with/without pith

Type of specimen	Loading direction	n	Density (g/cm³)	σ_ep (MPa)	σ_e5% (MPa)	σ_e19% (MPa)
Specimen without pith	Radial	12	0.39 (0.04)^b	3.75 (0.87)^a	6.27 (0.74)^b	9.64 (0.94)^b
Specimen without pith	Tangential	12	0.39 (0.04)^b	4.92 (1.02)^b	6.76 (0.89)^b	9.91 (1.57)^b
Specimen with pith		6	0.49 (0.04)^a	5.52 (0.98)^b	9.22 (1.26)^a	14.72 (1.18)^a

The values represent the averages, and the values in parentheses represent the standard deviations of the specimens. Different characters show significant differences (p < 0.05)
n number of specimens, σ_ep stress at the proportional limit, σ_e5% stress at 5% strain of thickness ratio, σ_e19% stress at 19% strain of thickness ratio