Lining With Pencil And Try-Square (). Hold the beam of the square firmly against the working-face, and, using the outside edge of the blade as a guide, continue across face B the lines on the working-face which were made by use of the framing-square. If the work has been well done, the lines will be sharp, straight, and parallel, as shown by ab, cd, etc., Face B, Fig. 137.

Fig. 141