A column is a type of structure that helps transmit the weight of a structure above to the elements located below. In this way, a column helps support the weight of the structure overhead. Columns operate through compression. Columns tend to be designed in ways that enable them to resist lateral forces. Moreover, columns sometimes have an aesthetic purpose only and they do not support any load.
Entasis is defined as the convex curve given to a column in order to avoid the optical illusion of weakness. Entasis is frequently used in Classical columns, such as greek columns.
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