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Calculator Introduction

This calculator computes the critical load of the specified column. In addition, the boundary condition factor and the effective length of the column are also calculated.

Both theoretical and engineering results are presented. The theoretical critical load is obtained directly from the elastic buckling theory. The boundary conditions are considered to be perfect as specified. The engineering critical load is used in column design, where the ideal boundary conditions are approximated.

 Note: 1 The critical load is good for long columns, in which the buckling occurs way before the stress reaches the compression strength of the column material. 2 For the classification of short, intermediate, and long columns, please refer to the column introduction or to thecolumn design calculator for structural steel. 3 The boundary conditions for the column can be a combination of the following terminations:

Inputs
 Young's Modulus (E): Pa kPa MPa GPa psi ksi Area Moment of Inertia (I): mm^4 cm^4 m^4 in^4 ft^4 Length of Column (L): cm m in ft Boundary Conditions: Free-Free Hinged-Free Hinged-Hinged Guided-Free Guided-Hinged Guided-Guided Clamped-Free Clamped-Hinged Clamped-Guided Clamped-Clamped