12Beams of considerable length must be procured, upon which are fixed cheeks in which the axles are retained; in the middle of those beams holes are made, into which are received the capitals of the catapultæ, well tightened with wedges, so that the strain will not move them. Then brazen stocks are fixed for the reception of the capitals, in which are the small iron pins which the Greeks call ἐπισχίδες.
12Beams of very generous length are selected, and upon them are nailed socket-pieces in which windlasses are inserted. Midway along their length the beams are incised and cut away to form framings, and in these cuttings the capitals of the catapults are inserted, and prevented by wedges from moving when the stretching is going on. Then the bronze boxes are inserted into the capitals, and the little iron bolts, which the Greeks call ἑπιξυγἱδες, are put in their places in the boxes.