Timber Catalogue
Reference design values for structural timber to NDS (US) and Eurocode 5 (EN 338 / EN 14080) - dimensional lumber, glulam, LVL/PSL/I-joist and CLT.
Reference design values for visually-graded sawn softwood - Douglas Fir-Larch, Hem-Fir, Spruce-Pine-Fir and Southern Pine (NDS), plus EN 338 strength classes (EC5).
C16 (EN 338)
fm,k 16 N/mm² | E0,mean 8 kN/mm²
C18 (EN 338)
fm,k 18 N/mm² | E0,mean 9 kN/mm²
C24 (EN 338)
fm,k 24 N/mm² | E0,mean 11 kN/mm²
C30 (EN 338)
fm,k 30 N/mm² | E0,mean 12 kN/mm²
Values are shown before adjustment factors. Apply the NDS C-factors or EC5 k_mod and γ_M for your load case.