Principles of Drawing 17
dharm
d:\N-Design\Des2-1.pm5 Seventh Print
Table 2.5B Axis lines
Instructions Correct Incorrect
Axis line starts and
ends with a longer dash
Two axes intersect
with longer dashes
Axis extends the
boundary with a longer dash
2.4.3 Termination of Leader Lines
A leader is a line referring to a feature (dimension, object, outline, etc.).
Leader lines should terminate (Fig. 2.7),
(a) with a dot, if they end within the outlines of an object,
(b) with an arrow head, if they end on the outline of an object,
(c) without dot or arrow head, if they end on a dimension line.
(a) (b) (c)
Fig. 2.7 Termination of leader lines
It is common practice to omit hidden lines in an assembled view, when their use tends to
confuse an already complex drawing or when the feature is sufficiently clear in another view;
but it is not advisable for a beginner to do the same and he will have to show the hidden lines
in his drawing practice.
