Trabes enim supra columnas et parastaticas et antas ponuntur; in contignationibus tigna et axes; sub tectis, si maiora spatia sunt, et transtra et capreoli, si commoda, columen, et cantherii prominentes ad extremam suggrundationem; supra cantherios templa; deinde insuper sub tegulas asseres ita prominentes, uti parietes protecturis eorum tegantur.
Beams are placed on columns, pilasters and responds. In floors there are joists and planks. Under roofs, if the spans are considerable, both cross pieces and stays; if of moderate size, a ridge piece with rafters projecting to the edge of the eaves. Above the principal rafters, purlins; then above, under the tiles, rafters which overhang so that the walls are covered by the eaves.
final_alignments\Vitruvius_Architecture_Book_4.json