C30 (EN 338) - Design Values

C30 (EN 338) is a dimensional lumber grade with reference design values to EN 338:2016. In Eurocode 5 terms its characteristic bending strength fm,k is 30 N/mm², compression parallel fc,0,k is 24 N/mm², and mean modulus E0,mean is 12 kN/mm² (EN 338 / EN 14080). Values are shown before adjustment factors; apply the relevant NDS C-factors or EC5 k_mod and γ_M for your load case.

fm,k (bending): 30 N/mm²
fc,0,k (compr.): 24 N/mm²
E0,mean: 12 kN/mm²

Characteristic values (EN 338 / EN 14080)

fm,k	Bending strength	30 N/mm²
ft,0,k	Tension parallel	19 N/mm²
ft,90,k	Tension perpendicular	0.4 N/mm²
fc,0,k	Compression parallel	24 N/mm²
fc,90,k	Compression perpendicular	2.7 N/mm²
fv,k	Shear strength	4 N/mm²
E0,mean	Mean MOE parallel	12 kN/mm²
E0,05	5th-percentile MOE	8 kN/mm²
Gmean	Mean shear modulus	0.75 kN/mm²
ρk	Characteristic density	380 kg/m³
ρmean	Mean density	460 kg/m³

Source: EN 338:2016. Reference values are shown before adjustment factors (NDS C-factors / EC5 k_mod, γ_M) - apply these per your load case in design.

Other Dimensional Lumber grades

Douglas Fir-Larch, Select Structural Douglas Fir-Larch, No. 1 Douglas Fir-Larch, No. 2 Douglas Fir-Larch, No. 3 Hem-Fir, Select Structural Hem-Fir, No. 1 Hem-Fir, No. 2 Spruce-Pine-Fir, Select Structural Spruce-Pine-Fir, No. 1/No. 2 Spruce-Pine-Fir, No. 3

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