Altitudo eorum, quanta longitudo fuerit quarta dempta, sub trabes extollatur; reliquum lacunariorum et arcae supra trabes ratio habeatur.
The height of the atrium to the underside of the beams is to be three-quarters of the length. The remaining quarter is to be assigned as the dimension of the ceiling and of the roof, above the beams.
final_alignments\Vitruvius_Architecture_Book_6.json