Gradus spectaculorum, ubi subsellia componantur, gradus ne minus alti sint palmopede, <ne plus pedem> et digito sex; latitudines eorum ne plus pedes duo semis, ne minus pedes duo constituantur.
As to the rows of the auditorium where the seats are placed, the seats are not to be lower than 16 inches nor more than 18. The width is not to be more than 2 feet nor less than 2 feet.
final_alignments\Vitruvius_Architecture_Book_5.json