EN 338 - Table 1 - Strength classes - Characteristic Values

EN 338 - Table 1 - Strength classes - Characteristic Values
Wood Class	Strength Properties (in N/mm²)						Stiffness properties (in kN/mm²)				Density (in kg/m³)	Density (in kg/m³)
Wood Class	Bending	Tension Paralel	Tension Perpendicular	Compression Parallel	Compression Perpendicular	Shear	Mean modulus of elasticity parallel	5% modulus of elasticity parallel	Mean modulus of elasticity perpendicular	Mean shear modulus	Density (in kg/m³)	Density (in kg/m³)
	f_m,k	f_t,0,k	f_t,90,k	f_c,0,k	f_c,90,k	f_v,k	E_0,mean	E_0,05	E_90,mean	G_mean	r_k	r_mean
C14	14	8	0.4	16	2	3	7	4.7	0.23	0.44	290	350
C16	16	10	0.4	17	2.2	3.2	8	5.4	0.27	0.5	310	370
C18	18	11	0.4	18	2.2	3.4	9	6	0.3	0.56	320	380
C20	20	12	0.4	19	2.3	3.6	9.5	6.4	0.32	0.59	330	390
C22	22	13	0.4	20	2.4	3.8	10	6.7	0.33	0.63	340	410
C24	24	14	0.4	21	2.5	4	11	7.4	0.37	0.69	350	420
C27	27	16	0.4	22	2.6	4	11.5	7.7	0.38	0.72	370	450
C30	30	18	0.4	23	2.7	4	12	8	0.4	0.75	380	460
C35	35	21	0.4	25	2.8	4	13	8.7	0.43	0.81	400	480
C40	40	24	0.4	26	2.9	4	14	9.4	0.47	0.88	420	500
C45	45	27	0.4	27	3.1	4	15	10	0.5	0.94	440	520
C50	50	30	0.4	29	3.2	4	16	10.7	0.53	1	460	550
D18	18	11	0.6	18	7.5	3.4	9.5	8	0.63	0.59	475	570
D24	24	14	0.6	21	7.8	4	10	8.5	0.67	0.62	485	580
D30	30	18	0.6	23	8	4	11	9.2	0.73	0.69	530	640
D35	35	21	0.6	25	8.1	4	12	10.1	0.8	0.75	540	650
D40	40	24	0.6	26	8.3	4	13	10.9	0.86	0.81	550	660
D50	50	30	0.6	29	9.3	4	14	11.8	0.93	0.88	620	750
D60	60	36	0.6	32	10.5	4.5	17	14.3	1.13	1.06	700	840
D70	70	42	0.6	34	13.5	5	20	16.8	1.33	1.25	900	1080