Lumber - Compression - CSA O86
Lumber size
Lumber
Width b = in mm
Depth d = in mm
Cross section A = in2 mm2
Wood properties
Wood species and grade
Bearing strength Fcp = psi MPa
Axial compression strength fc = psi MPa
Modulus of elasticity E05 = psi MPa
Factors
Load factor       α =
Resistance factor       φ =
Resistance factor (bearing)       φb =
Load-duration
      KD =
System
      KH =
Service-condition
Bearing KScp =
Axial KSc =
Axial Kse =
Treatment       KT =
Size factor (bearing)       KZcp =
Bearing length       KB =
Factored axial strength (KD, KH, KSc, KT, α,φ) Fc = psi MPa
Effective length variables
Effective length factor Ke =
Number of braces in the "b" direction    
Number of braces in the "d" direction    
Allowable axial load (imperial)
Post full-height Direction Effective length Slenderness ratio Size factor Slenderness factor Allowable
L ( ft )   Le ( ft ) Cc ( < 50 ) KZc Kc P ( lbf )
b
d
Allowable axial load (metric)
Post full-height Direction Effective length Slenderness ratio Size factor Slenderness factor Allowable
L ( m )   Le ( m ) Cc ( < 50 ) KZc Kc P ( kN )
b
d
Allowable bearing load
Allowable bearing (KD, KScp, KT, KB, KZcp,α,φb) Q = lbf kN
Slenderness ratio above 50
              Version:   20260319