
Pillar uses in construction will be explained briefly. To learn more, stay with us.
According to encyclopedia pillar is a column that stands perpendicular to the ground and generally serves to support the beams of a roof. Sometimes in construction and architecture, no distinction is made between pillar, column, and post.
The pillar is used in construction in three ways : (1) as a functional element in construction to support a large ceiling; (2) to emphasize an ornate door at the front of a building, or to emphasize the outline of a building; and sometimes (3) to take the place of a doorpost and support a massive lintel. Another type of support performing the same functions is the pilaster which does not stand free but is attached to and stands out from the wall. There is another type of pillar that stands alone and is not connected with any other structure; this type of pillar was designed to attract attention and to serve as a place around which a crowd could gather.
According to wikipedia pillar is column in architecture and structural engineering. Pillar is a structural element that transmits, through compression, the weight of the structure above to other structural elements below. In other words, a column is a compression member. The term column applies especially to a large round support (the shaft of the column) with a capital and a base or pedestal, which is made of stone, or appearing to be so. A small wooden or metal support is typically called a post, and supports with a rectangular or other non-round section are usually called piers.
For the purpose of wind or earthquake engineering, columns may be designed to resist lateral forces. Other compression members are often termed columns because of the similar stress conditions. Columns are frequently used to support beams or arches on which the upper parts of walls or ceilings rest.
In architecture, column refers to such a structural element that also has certain proportional and decorative features. A column might also be a decorative element not needed for structural purposes; many columns are engaged, that is to say form part of a wall. A long sequence of columns joined by an entablature is known as a colonnade.

Pillar, in architecture and building construction, refers to any isolated, vertical structural member such as a pier, column, or post. It may be constructed of a single piece of stone or wood or built up of units, such as bricks. It may be any shape in cross section. A pillar commonly has a load-bearing or stabilizing function, but it may also stand alone, as do commemorative pillars.
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Sources
en.wikipedia.org/wiki/Column
www.britannica.com/technology/pillar
www.encyclopedia.com/literature-and-arts/art-and-architecture/architecture/pillar
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