The design of an eccetrically loaded column should be revised, if

[ $σ_{c}$ = Allowable working stress in compression in the member subjected to axial load only, ${σ^{'}}_{c}$ = Calculated average axial compression stress, $σ_{b}$ = Maximum allowable bending compressive stress on the extreme fibre, and ${σ^{'}}_{b}$ = Calculated bending stress in the extreme fibre]

- 1
  
  $\frac{{σ^{'}}_{c}}{σ_{c}} + \frac{{σ^{'}}_{b}}{σ_{b}} < 1$
- 2
  
  $\frac{{σ^{'}}_{c}}{σ_{c}} - \frac{{σ^{'}}_{b}}{σ_{b}} < 1$
- 3
  
  $\frac{{σ^{'}}_{c}}{σ_{c}} + \frac{{σ^{'}}_{b}}{σ_{b}} > 1$
- 4
  
  $\frac{{σ^{'}}_{c}}{σ_{c}} - \frac{{σ^{'}}_{b}}{σ_{b}} > 1$

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