The building of patterns and finishing them accurately to shape is greatly assisted in many cases by a marking-off table. This is a flat cast-iron slab about 4 x 6 feet surface which is ribbed underneath for rigidity. It is mounted as shown in Fig. 114. The sides and ends are at right angles to the top.

Such a table affords a level base for the purpose of accurate building up or measuring a pattern, particularly when its parts are intricate.

Fig. 114. - Marking-Off Table.