‹‹‹ Vitr. 10.10.4 | Table of Contents | Vitr. 10.10.6 ›››
5The smaller back column, which in Greek is called ἀντίβασις, is eight holes long, one hole and a half wide, and three twelfths of a hole thick. The base (subjectio) is twelve holes, and its breadth and thickness the same as that of the smaller column. The chelonium or pillow as it is called, over the smaller column, two holes and a half; also two holes and a half high, and one hole and three quarters wide. The mortices (carchesia) in the axles are two holes and a half; their thickness also two holes and a half, and their width one hole and a half. The length of the transverse pieces with the tenons is ten holes, their width one hole and a half, their thickness ten holes. The length of the arm is seven holes, its thickness at bottom three twelfths, and at top half a hole. The curve part eight holes.
5The antefix has the breadth of a hole and one eighth, and the thickness of one hole. The smaller support, which is behind, termed in Greek ἁντἱβασιϛ, is eight holes long, three quarters of a hole broad, and two thirds thick. Its prop is twelve holes long, and has the same breadth and thickness as the smaller support just mentioned. Above the smaller support is its socket-piece, or what is called the cushion, two and a half holes long, one and a half high, and three quarters of a hole broad. The windlass cup is two and seven twelfths holes long, two thirds of a hole thick, and three quarters broad. The crosspieces with their tenons have the length of . . . holes, the breadth of three quarters, and the thickness of two thirds of a hole. The length of an arm is seven holes, its thickness at its base two thirds of a hole, and at its end one half a hole; its curvature is equal to two thirds of a hole.