| From sixty to eighty feet, divide the length by four and one half and let the result be the width of the alae. |
| Their lintel beams should be placed high enough to make the height of the alae equal to their width. |
| From forty to fifty feet, divide the length by three and one half, and give the alae the result. |
| From eighty feet to one hundred feet, the length divided into five parts will produce the right width for the alae. |
| There was no second story over the alae, the tablinum, or the rooms about the peristyle. |
| When it is from fifty to sixty feet in length, devote one fourth of the length to the alae. |
