Eorumque parietes, pilae, columnae ad perpendiculum inferiorum medio conlocentur, uti solido respondeant; nam si in pendentibus onera fuerint parietum aut columnarum, non poterint habere perpetuam firmitatem.
The party walls, the piers, the columns, are to be placed with their centres perpendicularly above the lower parts, so as to correspond to the solid. For if the weight of the dividing walls or of the columns is over open spaces, it cannot be permanently sustained. .
final_alignments\Vitruvius_Architecture_Book_6.json