intercolumniation

—intercolumnal, intercolumnar, adj.

/in'teuhr keuh lum'nee ay"sheuhn/, n. Archit.

1. the space between two adjacent columns, usually the clear space between the lower parts of the shafts.

2. the system of spacing between columns.

[1655-65; < L intercolumni(um) space between columns (see INTER-, COLUMN, -IUM) + -ATION]

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In architecture, the space between columns that support an arch or entablature.

Classical, Renaissance, and Baroque architecture used a system codified by Vitruvius in which the measurement is expressed in terms of the columns' diameters (e.g., two columns might be described as being three diameters apart). The system conveniently expressed the measurement of a unit of space whose size varied from building to building according to the Classical order used.

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▪ architecture

      in architecture, space between columns that supports an arch or an entablature (an assemblage of moldings and bands that forms the lowest horizontal beam of a roof). In Classical architecture and its derivatives, Renaissance and Baroque architecture, intercolumniation was determined from a system codified by the 1st-century BC Roman architect Vitruvius.

      The measurement between columns was calculated and expressed in terms of the diameters of the columns in the building—i.e., two columns were expressed as being 3 diameters (3D) rather than 9 feet (2.7 metres) apart. This system by Vitruvius conveniently and universally expressed the measurement of a particular unit of space, the size of which varied from building to building, according to the Classical order used.

      Vitruvius established five standard measurements for intercolumniation: 1¹/₂ diameter interval (D), called pycnostyle intercolumniation; 2D, called systyle; 2¹/₄D (the most common ratio), called eustyle; 3D, called diastyle; and 4 or more D, called araeostyle.

      Although the five standard ratios prevailed, variations in actual building practice frequently occurred. In Doric temples the intercolumniation at the corners was sometimes half as wide as the intercolumniation along the front and lateral sides of the building.

      In Japanese architecture, intercolumniation is based on a standard unit, the ken, which is divided into 20 sections, each termed a minute of space; each minute is subdivided into 22 units, or seconds.

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