The single rope of a cantilever crane supports a load of 200 kN and passes over two pulleys and then vertically down the axis of the crane to the hoisting apparatus. The section AB of the crane is a hollow rectangle. The outside dimensions are 37.5 cm and 75 cm and the material is 2.5 cm thick all round, and the longer dimension is in the direction AB. Locate the position of the neutral axis. (Cambridge)

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Buckling of columns

The column is described as a vertical member of the structure that carries an axial compressive load, and buckling is a lateral deformation of the column under the application of load.