A pillar is the vertical load-bearing element of an architectural structure that transfers loads form the structure to the underlying structures aimed at receiving it. It may have a squared, rectangular, polygonal or more complex cross-section and constant or variable shape and/or size. In the latter case, it is known as tapered pillar. The pillar is usually provided with brackets and/or capitals casted together with the element in the event of a standard configuration or applied subsequently in special cases.
Pillars can be of two types:
- Single plane ones, commonly used for industrial buildings and characterised by a unique bracket frame on one or two sides provided for supporting the beams of a bridge crane;
- Multiple plane ones with more bracket and/or capital frames potentially arranged on all sides of the element.