![]() Most of our outer walls are constructed as 9” walls. The reason we choose rectangular or square columns is because of our wall construction.Circular Columns are aesthetically pleasing compared with other geometrical types of columns.Circular column shuttering is a little bit difficult ![]() Formwork is easy for a rectangular column due to its straight sides.Circular column requires a minimum of six numbers of reinforcement whereas square or rectangular column only need four numbers of reinforcement.Circular column occupies a smaller area If you construct a circular column having the same diameter of a square column’s side length, the circular column holds only 0.785 times of the square column area.If you see the above picture, after drawing 4 axes, the square becomes symmetrical. What is Symmetry? The geometric shape is symmetry if it can be divided into two identical pieces that are arranged in an organized fashion. ![]() So circular columns will have the same moment of inertia at all axes to avoid buckling failure. Whereas a square has 4 axes of symmetry, and a rectangle has 2 axes of symmetry. The circular or cylindrical shape is symmetry. Let’s forget about the columns just focus on the geometry parts alone to better understand this.
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