Fig. 322
Fig. 323
Fig. 324
Next cut two pieces of stripwood ½" × ¼" × 10½", L and M. At the ends of these drill holes, ¼ inch in diameter, through which passes the chain of the drawbridge. Fix these in position by triangular wedges glued to sides and to platform J.
On top, K, add struts to support M and L, as shown in the plate. The chains of the drawbridge are looped over nails driven into A and B, just above platform J.
The base may be mounted on small wheels and strengthened with projecting beams by which the tower may be pushed into position. (These are not shown in plate.) Ladders to reach the top can also be made (see Chapter IX), and a battering ram may be swung from platform H, as shown in the plate. A tower of this kind was used by the Crusaders in the siege of Jerusalem (1099).
Plate XIII MEDIÆVAL SIEGE TOWER
TRAPGET