Deinde in frontibus anterides, sive erismae sunt, una struantur, eaeque inter se distent tanto spatio, quanta altitudo substructionis est futura, crassitudine eadem, qua substructio; procurrat autem ab imo, pro quam crassitudo constituta fuerit substructionis, deinde contrahatur gradatim, ita uti summam habeat prominentiam, quanta operis est crassitudo.
Next, supporting walls or buttresses are to be carried up at the same time. The interval between them is to be the same as the height of the substructure, and the thickness that of the substructure. They are to project at the base in accordance with the thickness determined for the substructure. Then they are to be gradually diminished, so that at the top they may project as much as the thickness of the walling.
final_alignments\Vitruvius_Architecture_Book_6.json