2.1 General2.2 The Critical Load According to Classical Column Theory2.3 Effective Length of a Column2.4 Special Cases2.5 Higher-Order Governing Differential Equation2.6 Continuous Columns2.7 Columns on Elastic Supports2.8 Eccentrically Loaded Columns2.9 Geometrically Imperfect Columns2.10 Large Deflection Theory of Columns2.11 Energy MethodsReferences