The Doric column is very similar to the Tuscan model but has more refined elements. The base is D high with a square plinth 8/6 D wide by D high. The upper half of the base consists of a torus, bead, and fillet. Both radii of the torus and bead share the same centerline which also defines the edge of the fillet, or cincture, above.
The shaft is divided into 20 grooves. A channel is separated by a defined straight edge, or arris. Each arris is 18 degrees apart, the width slightly less than 1/6th D. The channels begin and end where the upper and lower cong’ of the shaft end and the column is straight.
The Doric capital is D high and is divided into three equal parts: the abacus, echinus and neck.
The abacus which is 7/6 D wide has a small cap made of a small fillet and cyma reversa.
The echinus mirrors the composition of the upper portion of the base; the larger ovolo is followed by a bead and fillet. Both the ovolo of the echinus and torus of the base are twice as big as the combined bead and fillet which follows each molding. Sometimes the ovolo of the echinus is shown with egg and dart.
The neck at 5/6 D wide is typically plain although it can be decorated with circular flowers. Below the neck is the astragal which can be drawn within a 1/16D by 1/16D square. The bead of the astragal is twice as tall as the fillet below.
Text: Martin Brandwein
Rendering: M. Gunnison Collins
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