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Southern Pine Reference Design Values

GradesBending (Fb)Tension
Parallel (Ft)
Shear Parallel (Fv)Compression Perpendicular (Fc⊥)Compression Parallel (Fc)Modulus of Elasticity (E)
1650f 1.5E1650102017556517001,500,000
1650f 1.7E1650102017556517501,700,000
1850f 1.7E1850117517556518501,700,000
2250f 1.9E2250175019080519251,900,000
2400f 2.0E2400192519080519752,000,000
2700f 2.2E2700215019080521002,200,000
2850f 2.3E2850230019080521502,300,000

Spruce-Pine-Fir Reference Design Values

GradesBending (Fb)Tension
Parallel (Ft)
Shear Parallel (Fv)Compression Perpendicular (Fc⊥)Compression Parallel (Fc)Modulus of Elasticity (E)
1500Fb 1.4E150090013542516501,400,000
1650Fb 1.5E1650102013542517001,500,000
1950Fb 1.7E1950137513542518001,700,000
2100Fb 1.8E2100157516052518751,800,000
2250Fb 1.9E2250175016052519251,900,000
2400Fb 2.0E2400192517061519752,000,000

Douglas Fir-Larch Reference Design Values

GradesBending (Fb)Tension
Parallel (Ft)
Shear Parallel (Fv)Compression Perpendicular (Fc⊥)Compression Parallel (Fc)Modulus of Elasticity (E)
1800Fb 1.6E1800117518062517501,600,000
1950Fb 1.7E1950137518062518001,700,000
2100Fb 1.8E2100157518062518751,800,000
2250Fb 1.9E2250175018062519251,900,000
2400Fb 2.0E2400192518067019752,000,000
2850Fb 2.3E2850230018573521502,300,000

Hem-Fir Reference Design Values

GradesBending (Fb)Tension
Parallel (Ft)
Shear Parallel (Fv)Compression Perpendicular (Fc⊥)Compression Parallel (Fc)Modulus of Elasticity (E)
1650Fb 1.5E1650102015040517001,500,000
1800Fb 1.6E1800117515551017501,600,000
2100Fb 1.8E2100157516055518751,800,000

  1. Canadian Standards for Machine Graded Lumber (NLGA)
  2. American Standards for Machine Graded Lumber (ALSC)
  3. American Grading Rules Organizations (ALSC)