Epistyliorum ratio sic est habenda, uti, si columnae fuerint a minima xiii pedum ad quindecim pedes, epistylii sit altitudo dimidia crassitudinis imae columnae; item ab xv pedibus ad xx, columnae altitudo demetiatur in partes tredecim, et unius partis altitudo epistylii fiat; item si a xx ad xxv pedes, dividatur altitudo in partes xii et semissem, et eius una pars epistylium in altitudine fiat; item si ab xxv pedibus ad xxx, dividatur in partes xii, et eius una pars altitudo fiat.
The proportion of the architraves should be as follows: if the columns are from twelve to fifteen feet, the height of the architrave should be half the thickness of the column at the bottom; from fifteen to twenty feet let the height of the column be divided into thirteen parts, and the height of the architrave be one part; from twenty to twenty-five feet, let the height be divided into twelve parts and a half, and let the architrave be one part of that in height; also from twenty-five to thirty let it be divided into twelve parts, and let the height be made of one part.
final_alignments\Vitruvius_Architecture_Book_3.json